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CD receiver

64 Reviews | 4 questions - 6 answers

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Item # 105KDR840B

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Our take on the JVC KD-R840BT

JVC's KD-R840BT CD receiver ups the ante with its 5-zone Functional Variable Color faceplate. You can adjust any of the five distinct zones on the face to your liking, for a custom look that'll match your car's interior or your sense of style. And you can even have selected zones change color with your volume adjustments.

For great looks and great sound

JVC's KD-R840BT CD receiver ups the ante with its 5-zone Functional Variable Color faceplate. You can adjust any of the five distinct zones on the face to your liking, for a custom look that'll match your car's interior or your sense of style. And you can even have selected zones change color with your volume adjustments.

The sound measures up to the sharp styling, with a strong internal amp and a 3-band parametric equalizer, plus high- and low-pass filters to tailor sound output to your speakers. If you're looking to build a system with external amps, three sets of high-voltage preamp outputs ensure the cleanest performance from your system. Front and rear USB inputs give you more flexibility for connecting USB devices.


The 5-zone variable color display gives you plenty of customization options.

Bluetooth® equipped for safety and convenience

Bluetooth is great for talking hands-free, but that's not the only way it can enhance your car audio experience. Pair up JVC's KD-R840BT CD receiver with your smartphone, and enjoy audio streaming of Internet radio for more musical variety. And, with many Android™ phones, you can receive text message notifications too.

And here's a cool feature — let's say you've got a business phone and a personal phone. Most car stereos with Bluetooth make you choose one for use in the car, but the KD-R840BT lets you pair two phones at once. And when a call comes in, the receiver will blink either blue or red, depending on the phone. So you'll either have your business game face on, or be ready to relax and unwind when chatting with a friend.

Android™ smartphone compatibility

JVC's Smart Music Control works with Android phones to support voice commands for controlling your music. You'll be able to change songs, search your music, and more without raising a finger. But if you like to get your digits involved, you can create playlists with the Mood Blender, or even adjust EQ settings with your phone. And this app lets you use your compatible Android phone's touchscreen to control many functions using finger swipes and gestures — for example, tap the screen to play and pause, or swipe right to skip forward a track. So pop your Android phone in a mount, and you can reach down and skip a track without taking your eyes off the road.

Internet radio control

PANDORA® Internet Radio is one of the most popular streaming stations on the web. iPhone users can control PANDORA through this JVC when connected to the USB slot, while Android and Blackberry owners control Pandora through the Bluetooth connection. Either way, you'll enjoy access to your favorite stations and display of song, artist, and album information on the receiver's screen while you're listening.

Never miss your favorite radio programs

Do you have news, sports, or other radio programs you don't want to miss? The KD-R840BT's radio timer feature automatically switches on the radio and tunes in the correct station, no matter what source you're on at the time. You can set the timer to work one time or daily, so it's great for catching the shows you enjoy during your daily commute.

Want to keep your steering wheel controls?

In most vehicles, you can use an adapter (not included) to connect your vehicle's steering wheel controls to this JVC stereo. Connect a few wires, then program the adapter for your particular car and the receiver, and you'll retain the convenience of your steering wheel controls. Check the "Accessories" tab for compatible adapters.

Bluetooth note: Use of this receiver's Bluetooth features will depend upon your phone's Bluetooth capabilities. Learn more in our article explaining Bluetooth profiles.

iPod note: If you're going to use your iPod with this receiver, be sure to check "Details" for specific iPod model compatibility with this receiver or its optional iPod adapter.

Product Highlights:

    General features:
    • CD receiver with AM/FM tuner
    • built-in MOSFET amplifier (20 watts RMS CEA-2006/50 peak x 4 channels)
    • plays CDs, CD-Rs, and CD-RW discs including discs loaded with MP3, WMA, and WAV files
    • Bluetooth for hands-free calling and audio streaming — full-time connection to two phones at once
    • built-in iPod control and USB connection to Android phones
    • control PANDORA® from your iPhone, Android, or Blackberry smartphone
    • detachable face with 5-zone variable-color illumination
    • remote control
    Audio features:
    • 24-bit digital-to-analog converter
    • high- and low-pass filters
    • 3-band parametric equalizer
    • compatible with Sirius XM satellite radio tuner
    • built-in iPod control and USB connection to Android phones
    • inputs: front and rear USB inputs, front auxiliary input
    • outputs: 6-channel preamp outputs (4.8-volt front, rear, and subwoofer)
    Other features and specs:

    What's in the Box:

    • CD receiver (with 10-amp ATC fuse inserted into chassis)
    • Face (attached)
    • Sleeve (installed)
    • Trim ring (installed)
    • Wiring harness
    • Microphone with integrated bracket (attached 12' cable terminated by a right-angle male 3.5mm connector)
    • Wireless remote control (RM-RK52)
    • CR2025 3V Lithium battery (installed)
    • Face-case
    • 2 Radio removal tools
    • Face fixing screw
    • Face case
    • Instruction Manual (En/Fr/Sp)
    • US Warranty Sheet
    • Canadian Warranty Card
    • "Caution!" note (attached to wiring harness)
    • Face Fixing screw note

    Great product, sounds and looks good. Love the Bluetooth feature!

    that one guy, Kansas


    JVC KD-R840BT Reviews

    Average Customer Review(s):

    (64 Reviews)

    kd 8840bt

    amp from tucson az on 4/8/2014

    1978 Ford Bronco
    Crutchfield Customer Review (What's this?)

    I believe for the price this is a great deck. The hands free bluetooth my friends say is better than in my 2013 f350 when im talking to them thru system...which is kind of scarey since this is just over a hundred, any way decent sound,,,controls I had to look up in manual to fully operate and we will see on durability since its a new purchase



    Great Reciever!

    Ben from Utah on 3/2/2014

    1997 Mitsubishi Eclipse
    Crutchfield Customer Review (What's this?)

    I bought this stereo for my car because it looked cool, it could change colors, and it was ready for subs. I really like the rear USB port, I hooked up my iPod to my radio and it is in the center console now. I've definitely had better receivers, I like Pioneer the best, but this is still a great one. I'm satisfied with the purchase.

    Pros: Rear USB I love it, trillions of different colors, Bluetooth, looks spunky sittin in the dash.

    Cons: It can get kindof tricky figuring out how to use the receiver, I think Pioneer receivers sound more clear, pressing the center button either pauses or mutes the music and takes some getting used to.

    Love this radio

    Paul from WA from Washington on 2/28/2014

    2002 Honda Accord
    Crutchfield Customer Review (What's this?)

    This radio has so many features that it has taken me a bit to fanagle the perfect sound for my car. But it sounds perfect. My kid loves changing the colors to match what he's wearing so I suppose it passes the kid cool factor as well. The rear USB fit perfect under the dash so now I have a hidden charger and it got rid of the unsightly iPhone charger in the center console.

    Pros: Looks great, sound great and great price. It even remembered my station presets after disconnecting the battery.

    Cons: None.

    Nice stereo

    that one guy from Kansas on 2/28/2014

    2004 Chevrolet TrailBlazer
    Crutchfield Customer Review (What's this?)

    Great product, sounds and looks good. Love the Bluetooth feature!



    Great head unit

    SlowRollinTurtle from Arkansas on 2/27/2014

    1999 Chevrolet Tahoe
    Crutchfield Customer Review (What's this?)

    Great unit, easy to use. Second jvc unit I've bought and both are great.



    Pleased customer

    Calif surfer from Los angeles, Ca on 2/26/2014

    2005 Chrysler Town and Country
    Crutchfield Customer Review (What's this?)

    I am pleased with the JVC radio. The price is good and it performs well so it is a good buy. The sound quality is better than my stock radio was in my town & country van.

    Pros: Instructions were good and easy to do. Splicing the connector on was made easy with the suppplied wire connectors. The adapter for the radio fit well. It paired with my i phone easiely and works excellent.

    Cons: The radio operating instructions are a bit complitated and require come time to get right. Lots of features to understand.

    Great gear

    J from Beaverfalls, pa on 2/22/2014

    2003 Pontiac Vibe
    Crutchfield Customer Review (What's this?)

    Great gear, even better buy for the price. Would recommend this to everyone!!!

    Pros: Lots of customization options. Plus it's jvc so you know it's worth it. Built in Bluetooth so you don't have to worry about losing the blue tooth adaptor.

    Cons: Buttons could be bigger, more subwoofer options needed. Overall one badass head unit though.

    love it!

    marissa from Illinois on 2/14/2014

    2001 Ford Escape
    Crutchfield Customer Review (What's this?)

    I really love this stereo. Lots of cool features. Crutchfield even sent me everything I needed for installation.

    Pros: It automatically syncs up with my phone when Bluetooth is on. Great for hands free calls when driving or listening to Pandora radio.

    Cons: None so far!

    Really Nice Head Unit

    Wesley from Beaver, OH on 2/8/2014

    2002 Jeep Liberty
    Crutchfield Customer Review (What's this?)

    It is an awesome stereo, sounds great and was easy to install. Really like the Bluetooth feature. Would defiantly buy another.

    Pros: Looks really good and the Bluetooth is a must have.

    Cons: None

    One of the best deals out there

    sandy from Pacifica, CA. on 1/14/2014

    Crutchfield Customer Review (What's this?)

    This is the best car stereo I have ever owned. The sound quality is excellent. Just the look of the stereo is awesome with the different colored lights. I also like the fact that you can play your ipod . and the blue tooth connection for a hands free phone calling.

    Pros: Sound quality, ease of use, and a Great value.

    Cons: can't think of one

    jvc kd-r840bt

    Art from orangevale, ca on 1/10/2014

    Crutchfield Customer Review (What's this?)

    overall im very happy with my purchase. finding out that it does more than i had expected but still working on figuring out the eq

    Pros: looks great and sounds great and ya cant beat the price

    Cons: AT FIRST learning how to set to your own personal preferences was a challenge but getting the hang of it now

    Fantastic Stereo

    Anonymous from Anchorage, AK on 12/27/2013

    2005 Jeep Liberty
    Crutchfield Customer Review (What's this?)

    Bought this for my wife for Christmas. Its a very cool, feature rich stereo with great sound. Install was a breeze, setup and configurations was super easy. Setup and sync with her smartphone was a breeze, now she is listening to Bluetooth streamed music and taking calls off her phone. Besides all the great features, the display has a super cool look with a zillion different color combinations etc. I would recommend to anyone looking to replace an older or stock stereo.

    Pros: Lots of features, Bluetooth for phone calls, imports contacts, stream any kind of music off smartphone, connect ipod, mp3, other devices.

    Cons: buttons are a bit cluttered, Bluetooth mic sound is marginal.

    JVC KD-R840BT

    Anonymous from San Juan, PR on 12/20/2013

    1994 Hyundai Excel
    Crutchfield Customer Review (What's this?)

    Excelent update to my car



    Great Radio, Great Features for a Great Price

    Dexter N from Portland, ME on 12/11/2013

    2003 Jeep Wrangler
    Crutchfield Customer Review (What's this?)

    Really, really love this radio. Put this in my 03 Wrangler after my old radio went out. There were many more features than I had originally thought which i really loved. Super easy to use, easy to install and overall a great radio.

    Pros: Great Sound, easy use, easy install, not to many bad things to say.

    Cons: When I got the kit it was missing several parts including bolts and one connector which I found at a local hardware store which isn't that big of a problem.

    JVC KD-R840BT

    bouge07 from Gray, LA on 12/11/2013

    2005 Dodge Ram 1500
    Crutchfield Customer Review (What's this?)

    Easy to set up and does everything that need a stereo to do. Easy set up and easy to use, once you get used to the menu layout.

    Pros: Any color easy set up easy to install


    Good Radio - Couple of Speed Bumps - Good Support

    John S from Castle Rock, CO on 11/23/2013

    Crutchfield Customer Review (What's this?)

    Needed to replace a failed radio in a Mountaineer. This provides a good range of features including the BT connectivity for only a little more than a repair to the old radio. The BT worked very well with my Samsung Android phone for both phone calls & Pandora. It gives me the capabilities found in new car factory systems at a much lower cost. Comments from people on the other end of the phone were very positive for clarity & volume. As far as the radio sound, this is one star down due to my inability to run it higher with the factory speakers - not the radios fault, but couldn't test the high power end. Overall, the installation was not very difficult if you have a basic understanding of auto dashes and radios. Even without that, the instructions were good so even a novice could probably handle it without much challenge. Don't forget the second acknowledgement for the BT pairing. That one bit me because I didn't read it well. I did have some speed bumps with the supplied harness / cabling, but Crutchfield shipped out a replacement and afterward, went the extra effort to make everything right. I would definitely consider buying from them again.

    Pros: Good sound, great BT / phone features. Programing relatively intuitive after a quick skim of the manual. Good support from Crutchfield.

    Cons: Obnoxious initial demo mode - could trigger an epileptic fit :) .

    Installation for JVC KD-R840BC Mustang II

    DarylS from Wheaton, MN on 11/16/2013

    1983 Ford Mustang
    Crutchfield Customer Review (What's this?)

    The Radio installation was a little more complicated than I had first thought for the 1983 Mustang convertible due to the 2 channel factory installed amplifier. I ended up having to completely bypass most of the factory wiring associated with the amp. I used the installation kit and wired the included connectors directly to all the installed speakers. I did not use the PAC SOEM-4 Factory Integration Adapter nor was it needed after wiring direct to the speakers. The wiring in the Mustang does not match any of the install kit or normal radio wiring colors, so it is best to get a drawing of the factory radio installation. I tried every way that technical help thought to wire the PAC SOEM-4 Factory Integration Adapter, but couldn't get more than a normal conversation level of speaker noise, so that is why I wired direct to the speakers and I ended up not using the PAC-4 I should have done that in the first place. It sounds great and has the volume needed for a convertible.

    Pros: After installation works great with the satellite radio option

    Cons: Lots of modifications to the dash and wiring. It has an obnoxious demo mode the comes up everytime power is removed from the unit. I had disconnected the battery for the install and did lots of temporary test, got tied of the demo mode.

    Great head unit!

    stephen from Fredericksburg on 11/9/2013

    2008 Toyota Tacoma
    Crutchfield Customer Review (What's this?)

    Great head unit, forced to buy after my car was broken into and head unit was stolen. Chose this headunit as it had all the same features I needed. (Bluetooth and aux cord really) I really noticed the difference going from 2v to 4.8v preamp voltage. nice little pick-me-up after losing the previous head unit.

    Pros: Bluetooth, Color control, clear audio

    Cons: Would've been nice to have a full LCD display, but I knew that before I bought the unit.

    great radio for price

    Mike from Bartlett, IL on 11/5/2013

    1999 Mitsubishi Eclipse
    Crutchfield Customer Review (What's this?)

    Bought for my sons car. Installation was easy and radio has good sound and features. Would buy again!!

    Pros: Cool features, good sound

    Cons: None

    Nice unit great price

    en258 from Kingman, KS on 11/4/2013

    2001 Jeep Grand Cherokee
    Crutchfield Customer Review (What's this?)

    Easy to use. Buttons are a little small and takes a little time with owners manual to figure some stuff out but once you do all is good

    Pros: price looks

    Cons: small buttons

    JVC In Dash 840BT

    rjw from Chapel Hill, North Carolina on 10/31/2013

    1995 BMW 540I
    Crutchfield Customer Review (What's this?)

    Good quality in dash replacement. The tuning is awkward - 6 stations preset with a button, the remaining 12 presets are a two button sequence plus a dial setting - not great while driving. Otherwise a great unit



    JVC KD-R840BT

    rlowrdr2003 from ttown alabama on 10/29/2013

    1995 Ford Mustang
    Crutchfield Customer Review (What's this?)

    real good head unite for the money does everything i need and more

    Pros: great buy

    Cons: no option to play pandora threw bluetooth

    JVC KD-R840BT

    Anonymous from Cheyenne Wyoming on 10/24/2013

    1996 Toyota 4Runner
    Crutchfield Customer Review (What's this?)

    Great receiver. Easy installation and great sound. Amazing for the money. Definitely recommend.

    Pros: Lights, sound, ease of use, Bluetooth

    Cons: None

    very nice

    ot from miami on 10/8/2013

    1994 GMC Sierra
    Crutchfield Customer Review (What's this?)

    Excellent for the price love the bluethoot option

    Pros: 2 Bluetooth at the same time nice features

    Cons: Hard to set up mike option it was better to pay for installing

    Just awesome

    BASS CHEF from Salinas CA. on 10/7/2013

    1995 Honda Del Sol
    Crutchfield Customer Review (What's this?)

    I love this unit

    Pros: Clean sound, easy EQ controls love the multiple color change zones reads usb very fast 4.8v rca outputs that is a plus every time front and rear usb built in Bluetooth the unit is just awesome

    Cons: Have not found any after two weeks of use

    JVC KD-R840BT

    Antonio A from Keatchie,la on 9/20/2013

    Crutchfield Customer Review (What's this?)

    I think it is a great receiver.



    Very Happy

    Laura M from Michigan on 9/18/2013

    2004 Ford F-250 Super Duty
    Crutchfield Customer Review (What's this?)

    This has great sound and more features than I will ever use.



    Another great product from JVC

    Todd B. from Brownsville, KY on 9/11/2013

    2005 Saturn ION 3
    Crutchfield Customer Review (What's this?)

    I only put JVC players in my vehicles and have since 1998. The player that is currently in my honda has been thru 3 cars and was purchased new back in 2002. Its still works great and that is why it was a no brainer that I bought this for my daughters first car. You get so much for the $$. The mic for the hands free calling works great and there are so many settings to really tweak the sound you want to get. I'll never own another player other than JVC. I recommend this for anyone but especially parents that want their kids to have hands free calling to make it safer on the road.

    Pros: Great value. Great sound. Awesome Features. Very easy to use. Bluetooth Tech is crisp and clear.

    Cons: Quite honestly the remote that comes with it is unnecessary but since its included for free no biggie. I just never use it.

    Awesome Head Unit!!

    Jeremiah from El Paso, TX on 9/3/2013

    2006 Mercury Mariner
    Crutchfield Customer Review (What's this?)

    Installed this in a Mercury Mariner. Couldn't have been easier! Heard the difference immediately, even through the supposedly "Premium" Audiophile System from Ford. Changed out the crap factory speakers and did custom install of Sony 6 1/2 component speakers, even though it was stated that they would not fit! Sounds INCREDIBLE now! Even through the factory amp and subwoofer! Couldn't be happier with all the extras like Bluetooth, Sirius XM radio which I actually Bluetooth using my free XM app which negates the need for a separate antenna (Sorry Crutchfield...) The DEMO Mode for the lights is a lil tricky to get rid of but once its done, you actually kind of mish the flashing lights and have to tweak it again to look as cool as before.

    Pros: Everything

    Cons: Not a one

    JVC KD-R840BT

    Will from Canterbury CT on 8/28/2013

    1988 Chevrolet C Series
    Crutchfield Customer Review (What's this?)

    Has many options for the money, Overall a good radio. It has 18 FM presets, 12 of them are a pain in the neck to get to.



    Good radio with lots of features for the price

    MattD from Germantown, MD on 8/23/2013

    1995 Mercedes-Benz E320
    Crutchfield Customer Review (What's this?)

    Nice radio with lots of features. Not super intuitive at first to use but not too hard to learn. At the price point it is hard to find anything to complain about.

    Pros: Bluetooth, Android/IPhone connectivity, decent performance all around

    Cons: Bluetooth can be a tad flaky but that seems true of most bluetooth

    Solid Single

    PC from Indianapolis, IN on 8/18/2013

    2005 Subaru Impreza WRX
    Crutchfield Customer Review (What's this?)

    Overall solid unit for the price. Only some slight glitches in connectivity with iPhone 5. Never anything that isn't correctable, though.

    Pros: Good sound, streaming, and 2 USB ports.

    Cons: Bluetooth sometimes doesn't cooperate.

    Great unit

    Rt from Great Falls, mt. on 8/14/2013

    2006 Nissan Sentra
    Crutchfield Customer Review (What's this?)

    Great stereo for the money. Everything worked as it was described and it sounds and looks great! Very happy I bought this unit!

    Pros: Bluetooth is easy to setup. Pandora compatible and phone calls are a breeze.

    Cons: There is a lot to try and learn about this unit and it can be overwhelming.

    JVC KD-R840BT

    D. L from Memphis, TN on 8/3/2013

    2007 Jeep Wrangler Unlimited
    Crutchfield Customer Review (What's this?)

    Very nice radio with good sound quality and high power came with good installation instructions.

    Pros: I like the Bluetooth and the pandora radio capabilities.



    Anonymous from los angeles, ca on 8/2/2013

    2002 GMC Sierra 1500
    Crutchfield Customer Review (What's this?)

    Easy to install in 2002gmc truck.

    Pros: variable color display, rear USB.

    Cons: small buttons for radio presets.

    JVC KD-R840BT

    JCara12 from Pennsylvania on 7/31/2013

    2004 Nissan Maxima
    Crutchfield Customer Review (What's this?)

    There are several features I like on this unit, most notably that I can play Pandora through my Android phone and use the unit's remote control to change the song. No need to go back and forth between the phone and the receiver. However, the receiver is not user-friendly. I read the manual top to bottom and spent about 30 minutes trying to set things up but I still can't figure out how to use folders on the USB drive or how to fix the lighting. The receiver display flashes and changes colors like crazy and it looks like a rave party in my car at night- so embarrassing. I am sure Crutchfield can help me fix these things but I just don't have the time to mess with it. The sound might be good but I wouldn't know. I bought the unit bc I was advised to by Crutchfield bc of its high preamp output voltage but found out after installation that my car's amp can't handle it and it basically sounds like crap if I turn it up past regular listening volume. I'm not happy with this purchase or the advice I received from Crutchfield.




    Skate shredder from Temperance mi on 7/29/2013

    1999 Jeep Cherokee
    Crutchfield Customer Review (What's this?)

    I have always loved JVC products and I had a old JVC radio in my cherokee and it was about 10 years old so I needed an upgrade I compared all the other ones and even a 1,000 dollar one and this one was way better

    Pros: Easy buttons. Great features. Amazing Bluetooth.

    Cons: Wish it had HD radio but o well I love it

    JVC KD-R840BT

    John C. from Minneapolis, MN on 7/24/2013

    1990 Ford Mustang
    Crutchfield Customer Review (What's this?)

    Hard to program features , especially getting rid of "demo" mode. Seems to skip over FM1 and only goes to FM2. Remote is awkwardly shaped and too small making it hard to use.



    JVC KD-R840BT auto radio

    Jedpop075 from Howard Beach, N.Y. on 7/16/2013

    1995 Ford Bronco
    Crutchfield Customer Review (What's this?)

    Very pleased with this radio and was easy to install with the installation kit for my auto

    Pros: Ease of installation

    Cons: N/A

    jvc kd r840bt

    Anonymous from Goodlettsville,TN on 7/14/2013

    1996 Ford Mustang
    Crutchfield Customer Review (What's this?)

    It was a good radio till my baby girl's car was broken to and the radio was stolen along with the amp and speakers now all gone.

    Pros: great radio and good price

    Cons: none

    Amazing! Sound difference!

    Anonymous from Chicago, IL on 6/30/2013

    2003 Toyota Matrix
    Crutchfield Customer Review (What's this?)

    At first I was going to get a ken wood receiver but glad I didn't because this one is just so amazing. As soon as I installed it (crutchfield makes installing super easy because they give you instructions and if you can't do it still they have a support line you can call) I could tell the difference in my music.

    Pros: Colors Sound quality USB Bluetooth Controller

    Cons: Honestly none.

    Great unit for the price.

    tsuds from Kona, HI on 6/25/2013

    2002 Toyota Tundra
    Crutchfield Customer Review (What's this?)

    I Got this mostly for the bluetooth hands free, and to improve audio quality over stock head unit. This unit definitely does both well. I couldn't ask for more for the price.



    Love It!!

    Ren from Vancouver, BC on 6/20/2013

    2008 Dodge Ram 1500
    Crutchfield Customer Review (What's this?)

    This stereo is awesome for the price!! Can't comment on the install as I had it done professionally, but the setting set up was a snap!

    Pros: Easy to use, great colors, awesome sound!

    Cons: Would like the tag display to show/rotate/filp between artist and song for all sources. For FM it seems to work, but for CD/SiriusXM/iPod you can only choose one or the other.

    Great radio!!

    Glen from Enterprise, Alabama on 6/18/2013

    2009 Chevrolet TrailBlazer
    Crutchfield Customer Review (What's this?)

    Got this radio installed in a few hours, took plenty of breaks :). Got all the parts I needed from crutchfield to put this in my 09 Trailblazer. Crutchfield gave me the instructions to put it in, and I had no problems with the installation at all. Put the mike on my steering wheel column, and haven't had any problems wih anyone hearing me talking normally, with the windows up. Synced up to my iphone without any problems. Even listen to my music through the bluetooth, no problem. I had gotten the adapter box through Crutchfield so my chimes work fine. The vox I got was CRUX SOCGM-17.



    JVC KD-R840BT

    Anonymous from San Antonio texas on 6/15/2013

    2006 Chevrolet Cobalt
    Crutchfield Customer Review (What's this?)

    Could not believe how good the low pass and high pass filters were I can turn up the volume much more than I used to and the sub and regular speakers don't distort. Also the 4.8 volt preout is awesome I can really see a difference from my old alpine that wa only a 4 volt preout. I recommend this stereo for anybody.



    Great Blue tooth for phone calls

    lolobiker from Riverside, Ca on 6/8/2013

    2001 Ford F-150
    Crutchfield Customer Review (What's this?)

    The JVC KD-R840BT work great in my F150 and the phone call sound great. Now I do not have to worry about getting a several hundred dollar ticket for using my phone while driving.

    Pros: Crutchfield sent all of the adapters for free!! Installation was a snap.

    Cons: None works great!!

    Great Radio

    SilverBack1975 from Cecil County, Md on 6/7/2013

    2004 Jeep Wrangler Unlimited
    Crutchfield Customer Review (What's this?)

    This is a Great Radio! The features can not be beat. I am using it to power Polk db Plate speakers up front and MTX 8 inch full range Marine speakers in the rear of my Jeep Wrangler Unlimited. Bluetooth works great and the mic has a long cord so placement was easy. The TWO usb ports are really slick too.

    Pros: Looks, Sound, Features and Coolness Factor.

    Cons: The remote takes getting used to.

    Nice radio for the money

    T-Rose from Indiana on 6/2/2013

    2000 Ford Mustang
    Crutchfield Customer Review (What's this?)

    JVC has always made quality stereos, but adding Bluetooth and iPod inputs while still keeping the cost low is great.

    Pros: Ease of use, bright colors with many to choose from in an easy to use menu. iPod and Bluetooth hookups 15 minute install with free gear from Crutchfield, and pandora controls are awesome with on screen display.

    Cons: No provisions for factory 6 volt for Mach 460 stereo's had to buy adaptor. Made popping noise when turning on. Returns to demo mode after reconnecting battery. Neither really an issue.

    one great deck

    texas from texas on 5/23/2013

    2006 Chevrolet Silverado 1500
    Crutchfield Customer Review (What's this?)

    I have a kenwood deck right now in our Yukon and it has good sound but the Bluetooth does not work all the time and sometimes during cold mornings it has a delay so I decided to try a jvc and what a difference it not only sounded great but the Bluetooth setup was super easy and have never had an issue syncing my phone I would recommend this to anyone



    JVC KD-R840BT

    rpsyork from York, PA on 5/23/2013

    Crutchfield Customer Review (What's this?)

    This is my 2nd JVC I have installed! Better than 1st because Blue tooth built-in!

    Pros: Built in blue tooth! Easy install. Looks great in dash!

    Cons: Some buttons a little small, especially for large hands!


    Brandon from Laurel mt on 5/21/2013

    1982 Chevrolet C Series
    Crutchfield Customer Review (What's this?)

    Easy to install, like how easy it was to install and figure out the buttons

    Pros: Looks

    Cons: I am having trouble getting the bluetooth to sound good without being scratchy. Not sure why it has such a hard playing the music clearly when running through the bluetooth?

    Great Radio

    RBC from Missouri on 5/20/2013

    2003 Ford F-250 Super Duty
    Crutchfield Customer Review (What's this?)

    So far this seems to be a great radio. The installation and setup was fairly simple as systems go anymore. I was very impressed with the bluetooth setup and function. My previous radio was always a pain to link with and then manage my Droid Razr. This one links and functions as it should without problems. Receiving calls and dialing the phone from the deck has worked flawlessly so far. I haven't tried the Pandora, MP3 disc or USB functions yet but so far everything is as documented.

    Pros: Simple installation and setup. Free factory wiring connector adapter was correct. Function of the radio was great and performed as documented on everything I've used so far. Good sound, great full featured stereo for the $$$.

    Cons: I thought that the free double DIN installation adapter and the instructions that were included were a bit lame but after a couple of calls to Crutchfield they worked well enough and the final installation looks great.

    Awesome stereo!

    Greyson from Windsor, CA on 5/16/2013

    2006 Chevrolet Cobalt
    Crutchfield Customer Review (What's this?)

    This stereo has it all. 2 USB ports, AUX port, Pandora, Bluetooth, etc. Also, its ease of use is a big plus, everything is simple to use and to figure out even without having to consult to the manual. I have owned many head units such as Sony, Pioneer, Kenwood, Dual, Valor, and JVC. Always have gone back to JVC for the sound quality, its cool factor, and ease of use. Bluetooth works great. Good sound quality and connects to my phone automatically when I turn on my car. Also can play Pandora through Bluetooth which is really nice. The light display is AWESOME! Especially on demo mode. Another great product from JVC

    Pros: Great Sound, Cool lighting display, Sound quality, Bluetooth, Pandora, Ease of use

    Cons: None

    Nice Head Unit

    Jose from New York, NY on 5/16/2013

    1999 Nissan Quest
    Crutchfield Customer Review (What's this?)

    Overall the JVC KD-R840BTis a nice head unit. It's well manufactured it doesn't feel or look cheap. It's got a great built-in amplifier. When it comes to the sound quality I was not all that pleased. Great bass, but I felt the mids and highs did not meet my expectations. Although I played with different EQ modes and trying to tweak the EQ, I still wasn't pleased with the end results. Pairing with my iPhone was a breeze and the Bluetooth works great for both streaming and calls. In terms of looks, even though it does not have a full-dot LCD it looks great. Overall a very good head unit. If it wasn't because my sound quality standards are very high, I would've given this unit an excellent rating.

    Pros: Great power Looks Packed with a good amount of features for its price

    Cons: Sound quality No illumination on buttons when unit is off

    Great sound

    Kevin from Grand Rapids, MI on 5/12/2013

    2009 Jeep Wrangler
    Crutchfield Customer Review (What's this?)

    This unit is easy to install, sounds great and has a lot of features. The Bluetooth feature works great and syncs well with the wife's IPhone. The microphone has a long cord and the sound quality is very good when making/receiving a call, the people on the other end couldn't tell we were talking to them through the radio. It has more than enough power to drive the Polk speakers and powered sub in my Jeep. The dual USB ports are nice, the cord from the rear of the unit reaches all the way into the glove box. I do agree with some others that using some of the features is too complicated (like setting presets 7-16) and that the screen is hard to see in the daylight, but for the money it is far better than the stock unit it replaced.

    Pros: Great sound and power, Bluetooth connectivity, dual USB ports, IPod/iPhone controls

    Cons: Complexity of programming presets, screen glare

    nice and easy to use without looking at the directions

    john from west valley NY on 5/12/2013

    Crutchfield Customer Review (What's this?)

    Its not about not reading the directions, It's about the ease of use, turn it on and start using it because its intuitive, I like that!

    Pros: good value and the crutchfield tech support was very helpfull with one small snag

    Cons: none


    Jorpamajo from Stamford, CT on 5/11/2013

    Crutchfield Customer Review (What's this?)

    Bluetooth is crystal clear, display perfect, easy to install, the local big box store was going to charge me $130.00 for the installation, I did it myself, really easy.

    Pros: All

    Cons: None

    Great Unit!

    Chris from Atlanta, GA on 5/9/2013

    1986 BMW 528E
    Crutchfield Customer Review (What's this?)

    Great unit! Replace the stock unit on my 86 BMW 528e (the premium system). Even the stock speakers sound much better. The installation instructions were great and the retrofit mounting tray (with bending tabs) works very well. However, the wires do get caught on the release tabs when pulling the unit out after the initial install (that's why I gave it 4 stars). I later added the Sound Ordnance flat subwoofer under the back seat and BAM! The system is just right for my daughter's use.

    Pros: Great fit, easy wiring, great sound.

    Cons: Sharp edges and release tabs on the retrofit mounting tray catch wires making subsequent removal difficult.

    Highly Recommend

    JennyC from Memphis, TN on 5/7/2013

    Crutchfield Customer Review (What's this?)

    After having to replace my head unit twice after the original unit I was sent did not have a very strong tuner, the second one they sent to replace the first was the wrong one, and this gem is what I ended up with, I am VERY happy. Crutchfield made sure that, despite the mishaps from the previous orders, I was happy. I have to admit I was a little skeptical after the problems I had, that they hit the nail on the head with this one. The display is very customizable and the user-friendly interface is perfect. This gave my Mustang Cobra the facelift it needed ;)



    Very good, not perfect

    Matty from Boston, MA on 5/3/2013

    2005 Volkswagen Jetta
    Crutchfield Customer Review (What's this?)

    This was an upgrade from a previous JVC Aresenal KDA-615, because I wanted Bluetooth. I was swayed toward the higher end model over the current 740BT and X250BT because of the dedicated EQ button on the front. I don't care about the 5 color zones. Dual USB ports (front, rear) is a nice bonus. Good: Bluetooth calling is awesome. People on the other end have never complained, or even mentioned that it sounds like speakerphone, and the voice quality on my end is excellent. That is awesome. The sound quality is very good. Really, what it does, it does very well. EQ button cycle includes subwoofer level, very handy. Bad: When playing through USB in either Head or Ipod mode, pressing the volume button pauses, but playing via EXT mode it only mutes. Also, in Pandora and BT mode pressing the volume button just mutes. In BT mode, you can pause by pressing the Menu button, but in Pandora mode, Menu brings up your list of stations, so there's no pause in Pandora mode! Why would I ever mute when I can pause? From time to time, I also get connection errors in Pandora mode, and I have to unplug, cycle through the inputs, and try again, sometimes going so far as to power off the unit. I also find that USB mode is louder than other modes, even with input volume turned to -5 (you can balance input levels individually in the menus). The unit auto-plays from iphone when you plug it in, so if the first song on your player is loud, prepare to be blasted.

    Pros: Bluetooth calling and audio streaming. Pandora on iphone works over BT, though can't thumbs up/down songs. Can pause though (press menu button) Front, rear, sub RCA outputs. Good sound EQ button access to Sub, bass, mid, treble levels Radio data (shows station name, song title) USB, Pandora, BT modes all show track info (Artist, album, title)

    Cons: pressing volume knob is context dependent pause/mute. should always pause except on radio. Way too dim in daylight even at brightest setting. No easy way to flip through preset radio stations. 1-6 are on buttons, or you can press Menu, then use knob to flip to desired station. But the knob is touchy, so it tends to skip ahead quickly, and on-screen display doesn't keep up with station names quickly. Could benefit from a 4-way button to seek up/down and scroll through presets up/down.

    Cool factor

    Nate from Logan,w.v. on 4/27/2013

    Has jvc ever made a bad product?ya get everything you need in this little deck that can,preamp voltage that will bring any amp to life,sound that will play every note in a crisp clear tone(with good speakers),music in almost every form possible today,and lets not forget the lights that keep giving.

    Pros: It's only happy when its loud


    JVC KD-R840BT

    Anonymous from 62052 on 4/25/2013

    Crutchfield Customer Review (What's this?)

    Absolutely horrible.

    Pros: Clear at loud volume

    Cons: When I had this stereo on and the eq adjusted to my preference it sounded like I had a 5 gallon bucket over my head. I sent it back and purchased a pioneer that was $10 cheaper. Pioneer sounded great, jvc sucked.

    Love it!

    Lab4 from Wyoming on 4/18/2013

    2005 Chevrolet Colorado
    Crutchfield Customer Review (What's this?)

    I used this to replace my stock deck in my '05 Colorado, and I have to say that I am very happy with it. I was originally looking for a DD deck but I could never find one that felt I would be happy with, and for the prices of them I didn't want to chance it. I found this along with several others with about the same features, but for the price this one blew them all away. The Bluetooth works flawlessly with my phone and the mic that comes with the deck, that I mounted just above the seat belt harness, works so well that my friends didn't even know I was using a mic, they usually sound like you're talking in a cave. All the user functions are easy to understand and if you're looking for a deck to match your interior lights this is the one. I don't care what color it is you will be able to match it or come very close. Six channels, blue tooth, syncs with pretty much any popular device out there. You cant beat it! Only issue I would have is the deck itself looks a little on the old school side. I had a clarion about 10 years ago that looked about the same. That is really just nit-picking though. with the customizable colors it didn't really make a lasting issue.

    Pros: Price A ton of features

    Cons: Looks a little dated for new tech

    Great Buy

    Dennis A. from Panama City, FL on 4/7/2013

    2012 Dodge Truck 1500
    Crutchfield Customer Review (What's this?)

    Just installed this radio today in my 2012 Ram 1500. With the vehicle kit that came for free it fit perfect in my dash. Radio was easy to setup after installation. Sounds great, has 3 different loudness functions. Setting up different color schemes was cool. Connecting my iPhone via Bluetooth was easy. Love that the radio included the mic for the handsfree talking. I haven't tested the USB ports yet and only because I'm able to listen to my music via Bluetooth. I guess I'll use the USB to charge my phone. Insturctions pretty easy to follow, I had all my wires tied in (with vehicle adapter sold separately) in about 2 hours and that's soldering and heat shrinking all the wires. This is my first time buying from Crutchfield and I'm very pleased with my decision.

    Pros: Easy setup, wireless remote control, Bluetooth mic included.



    Hands-on research

    Features and Specs

    AUX Input Front
    Audio/video Input ---
    USB Input Front/Rear
    CarPlay No
    Android Auto No
    Siri Control Bluetooth
    Android Control Yes
    Memory Card Slot USB memory
    Bluetooth Compatible Built-in
    Satellite Radio Ready SiriusXM
    HD Radio No
    Navigation ---
    iPod Compatibility
    Full size Classic/5Gen
    Nano 7/6/5/4/3/2/1
    Touch 5/4/3/2/1
    iPhone 5S/5C/5/4S/4/3GS/3G/2G
    RMS Power (CTA-2006) 20 watts
    RMS Power (Manufacturer) ---
    Peak Output 50 watts
    RMS Power Bandwidth 20-20kHz
    Preamp Outputs 6-channel
    Sub Preamp Outputs Yes
    Switchable Rear Preamp Outputs No
    Video Screen No
    Preamp Voltage 4.8 volts
    Display Color Variable
    Key Button Color Variable
    EQ Bands 3
    Wireless Remote Yes
    Steering Wheel Control Compatible Adapter required
    Parts Warranty 1 Year
    Labor Warranty 1 Year
    FM Sensitivity 9.3 dBf
    European Tuning Yes
    Seek/Scan Seek
    Radio Data System Yes

    Product Research

    Built-in Bluetooth
    Disc & USB Playback
    iPod/Android/AUX Integration
    AM/FM+Pandora+SiriusXM Radio
    Audio Section
    Display Features
    Remote/Bluetooth Control

    Built-in Bluetooth

    Bluetooth Technology: The JVC KD-R840BT is equipped with built-in Bluetooth (version 2.1+EDR), allowing you to make and receive phone calls wirelessly through the receiver; as well as stream music wirelessly from your smartphone to the head unit. In order to use Bluetooth wireless technology, your phone must also be Bluetooth compatible and be able to interpret certain profiles. This unit is compatible with the following Bluetooth Profiles:

    • Hands-Free Communication: HFP 1.5 (Hands Free Profile), OPP 1.1 (Object Push Profile), PBAB 1.0 (Phone Book Access Profile).
    • Audio Streaming: A2DP 1.2 (Advanced Audio Distribution Profile), AVRCP 1.3 (Audio/Video Remote Control Profile).
    Note: Due to the differences in Bluetooth technology, some Bluetooth enabled devices may be incompatible, function improperly, or may not support all features when used with the JVC KD-R840BT. See JVC's Bluetooth compatibility chart for a complete list of compatible Bluetooth enabled devices.

    Pairing: Your Bluetooth enabled mobile phone or digital audio player must be paired with KD-R840BT before hands-free & wireless operation. You can register up to five Bluetooth enabled devices with the JVC head unit. You can keep two phones connected at all times (only one can be used during a call).

    Bluetooth Hands-Free Communication: The head unit supports Bluetooth hands-free communication for your Bluetooth enabled mobile phone. The controls of the KD-R840BT can be used to dial a number, answer an in-coming call, or end a call. The unit also includes an external microphone (with mounting bracket) featuring adjustable gain, so you can carry on your side of the conversation while listening to the caller through your vehicles speakers.

    • Answering A Call: When a call comes in, a ring-tone will be heard through your vehicle's speaker and the caller's name or phone number will be displayed. You can also set the head unit's LCD to change colors when a phone call is received. You can answer the call from the head unit's front-panel controls, or setup the head unit to automatically answer the incoming call immediately or after 3/5/10 seconds. The KD-R840BT also supports the Call Waiting function, so you can answer another incoming call while suspending the current call you are on. Your compatible cell-phone must also support this feature.
    • Dialing A Number: Using the KD-R840BT, you can dial a phone number in one of the following ways:
      • Entering a Phone Number: Allows you to directly dial a phone number up to 32 digits from the head unit's front-panel rotary dial.
      • Speed Dialing: You can store up to 6 contacts in the memory of this unit for speed dialing.
      • Phone Book: You can dial by using the downloaded phone book. You can download phone book data from your cell phone to the KD-R840BT.You can search through your contacts alphabetically (A-Z) or numerically (0-9). Up to 400 numbers can be stored for each registered cell phone.
      • Call Log: The Call Log is a list of calls that have originated from and were received by this unit that you can dial. You can select Outgoing, Incoming, or Missed calls (up to 50 each).
      • Voice Dialing: If your mobile phone supports voice recognition, then you can dial out by voice command. Simply speak into the included microphone. 
    Note: During a conversation, you can switch between the Private Mode (talking directly on your cell phone) and the Hands Free Mode.

    External Microphone: The JVC KD-R840BT includes an external microphone to carry on your side of your phone conversation and voice command dialing. The external wired microphone offers improved audio quality versus an integrated microphone, so you can be heard easier over noisy traffic and road noise. You can adjust the volume level and noise cancellation of the microphone without affecting the other sources. The external microphone features an attached 12' cable terminated by a right-angle 3.5mm connector which plugs into the mic input on the rear-panel of the head unit. The microphone offers an integrated mounting bracket which can be clipped to your vehicle's sun-visor or taped to your dash. The external microphone measures 0.525" (diameter) x 1.485" (depth).

    Note: This unit does not offer an integrated front-panel microphone.

    SMS: If your Bluetooth enabled mobile phone is compatible with SMS (Short Message Service), the JVC head unit will notify you when a message has been received. You must then use your phone to check the message. You cannot read, edit, or send a message through this unit.

    Wireless Audio Streaming (w/ Metadata Display): The JVC KD-R840BT also supports wireless audio playback (AD2P) and control (AVRCP) of a Bluetooth enabled audio player or smartphone. The KD-R840BT will be able to control basic playback functions of your Bluetooth device's stored music; such as Play/Pause, Skip Next/Previous, Fast Forward/Rewind and Random/Repeat. The head unit will also display your stored music's song information; such as Artist name and Song/Album title. The KD-R840BT also supports audio streaming of music apps downloaded on your smartphone with metadata display and limited control. Advanced music control of your music apps will still need be done via your Bluetooth-enabled smartphone. When an incoming call or outgoing call is in progress from your Bluetooth enabled mobile phone, audio streaming will be paused so you can take your call. Once the call is finished, your streaming music will resume.

    Siri Digital Assistant Control: When paired and connected with an iPhone 4S or 5/5C/5S via Bluetooth (not USB), the JVC KD-R840BT has the ability to access Siri through its front-panel control and external microphone. Simply press the "phone command" button on theKD-R840BT to engage Siri and use the included microphone to communicate with Siri. Siri's voice will heard through your vehicle's speakers. All Siri functions including hands-free calling, music search, setting reminders, text-messaging, audible navigation, and more can be done through the head unit and its microphone. The head unit will only display hands-free calling and Bluetooth audio information (all other functions of Siri are only audible through the KD-R840BT; visual data will still need to be viewed from your iPhone device).

    Note: You can ask Siri to get directions to a destination and the turn-by-turn instructions will heard through your vehicle's speakers, while the on-screen map still displays on your iPhone 4S/5/5C/5S. The head unit's audio is attenuated while Siri provides audible directions.

    Disc & USB Playback

    Disc Compatibility: The unit features a single disc player that will playback CD-Audio, CD-Text, and finalized CD-R/CD-RW audio discs. The unit also supports playback of MP3/WMA music files loaded onto CD-R/RW discs.

    Dual USB Ports: The JVC KD-R840BT features a front-panel USB 2.0 type-A port (behind a sliding cover) and rear-panel USB 2.0 type-A port (attached to rear chassis by a 38" cable) for connection and control of a portable USB mass-storage class (MSC) device; such as select Android smartphones (Froyo/Gingerbread OS only), portable digital audio players, or USB thumbdrives. The USB ports enable audio playback and control of MP3, WMA, & WAV audio files stored on portable USB mass-storage class devices. USB portable audio devices that can be charged via USB will be charged when plugged into the CD receiver's USB ports (5V/1A), and the vehicle's ignition switch is set to ACC or On.  You cannot connect a USB device via a USB hub or Multi-Card Reader to this unit.

    MP3/WMA/WAV Playback: The JVC KD-R840BT supports the following types of MP3, WMA, & WAV files recorded onto CD-R/RW disc or loaded onto a USB mass storage class device.

    Media Type CD-R/RW USB Storage Device
    File System ISO9660 Level 1 or 2, Romeo, Joliet, or Windows long file name FAT 12/16/32
    Playable File Types

     MP3: bit rate of 8-320kbps w/ sampling rate of 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48kHz
    bit rate of 16-320kbps w/ sampling rate of 8-48kHz
    WAV (USB only):
    bit rate of 16-bit w/ sampling rate of 44.1, 48kHz.

    Maximum # of Folders/Files 255 folders/65,025 files (255 files per folder)
    Tags ID3 tag (version 1.0/1.1/2.2/2.3/2.4), WMA tag

    Track/Folder List: The Track/Folder List displays a list of MP3/WMA folders and tracks on a loaded CD or USB device, so you can easily access your music. The Track/Folder List will also display the list of track titles on a CD Text disc.

    Character Search: You can search for your MP3/WMA/WAV music tracks alphabetically (A-Z) or numerically (0-9).

    Random/Repeat Modes: The JVC KD-R840BT offers the following Repeat and Random playback modes.

    • Repeat: Track Repeat (plays the current track repeatedly), Folder Repeat (plays all tracks of the current folder repeatedly), Off (cancels repeat function)
    • Random: Folder Random (plays all tracks of the current folder, then the tracks of the next folder in random), All Random (plays all tracks of the current disc at random), Off (cancels random function)

    Resume: If you change the source, playback also stops (without ejecting the disc or USB device). Next time you select CD or USB for the playback source, the player will start from where it has been stopped previously.

    JVC Playlist Creator Compatible: JVC Playlist Creator is a free Windows-based desktop software that helps organize, manage and transfer MP3/WMA music files to your USB (MSC) device from your PC. When you playback audio files that have been stored on your USB (MSC) device using JVC Playlist Creator through the KD-R840BT, you can search a file by song title, album name, artist name, or genre using the head unit's Quick Search function. The JVC Playlist Creator is a Windows-based software that can be downloaded for free from JVC's website to your PC. The JVC Playlist Creator is compatible with the following Windows Microsoft Operating Systems.

    • Windows XP Professional, Home Edition SP2 or later (32-bit)
    • Windows Vista (32/64-bit)
    • Windows 7 (32/64-bit)
    Note: Not compatible with Apple iPod/iPhone/iPad, Zune, or Android.

    Off Insert/Eject: A CD disc can be inserted or ejected with the power off. When a disc is inserted with the power off, the unit will automatically power up and begin playback.

    Disc Protection: If the ejected disc is not removed within 15 seconds, the disc is automatically inserted again into the loading slot to protect it from dust. The source will change to CD, and the disc will begin playback, even if you have another source selected at the time.

    Mounting: For proper disc playback you must install the unit within 30-degrees of horizontal.

    iPod/Android/BlackBerry/AUX Integration

    iPod/iPhone Direct: The JVC KD-R840BT's front-panel or rear-panel USB port can acts as an iPod/iPhone high-speed direct connection when used with the USB/iPod cable that came with your iPod/iPhone. This USB connection allows audio playback, music navigation, information display, and charging of select iPod/iPhone models from the JVC in-dash head unit. The head unit supports audio playback from music stored on your iPod/iPhone or music apps (such as iHeartRadio, SiriusXM,, Rhapsody, & Slacker) streamed to your iPhone (not all music apps will be compatible).

    • DAC Bypass: The USB connection allows your iPod/iPhone's stored music and music apps to be loaded instantly to the head unit and sound quality to be maximized through the head unit's 24-bit D/A converter, allowing for a Signal to Noise ratio up to 105dB. The JVC head unit supports audio playback of music, podcasts, audiobooks, and music apps stored on your iPod or iPhone.
    • Music Control: You can choose to operate your iPod/iPhone through the JVC head unit's front-panel controls, from its clickwheel/touchscreen, or via a streamed app from your iPhone.
      • Head Unit Mode: From the head unit's front-panel controls you can search for music by Playlist, Artist, Album, Song, Podcast, Genre, and Composer. You can search a Playlist or Category alphabetically (A-Z) or numerically (0-9). The KD-R840BT also supports Repeat (file/all) and Random (album/all) playback functions of your iPod/iPhone. Your iPod/iPhone's clickwheel or touchscreen remains accessible in this mode. You can also control basic playback functions (such as Play/Pause, Previous/Next Track) from select music apps streamed to your iPhone.
      • iPod Mode: You can choose to navigate your iPod or iPhone's stored music from its clickwheel or touchscreen, like you are accustomed to during normal usage. Basic playback control (such as Play/Pause, Previous/Next Track) can still be done through head unit for stored music and music apps.
      • External Mode: External Mode allows you to solely navigate your connected iPod/iPhone device through its clickwheel or touchscreen. Playback of your iPod/iPhone's stored music and streamed music apps is supported. The head unit's iPod/iPhone controls will be locked.
    • iPod Display: The KD-R840BT will display your Apple device's stored music and streamed music app song/artist information, when in Head Unit and iPod mode (not in External mode), or listening to Pandora Internet Radio. The head unit can display Track number, Elapsed playing time, Artist name, Song/Artist title, and Station identification
    • iPod Charging: The head unit's USB connection provides 1A of current to power and charge your connected iPod/iPhone when your vehicle's ignition switch is set to the 'ACC' or 'On' position. This unit does not charge the iPad. If your iPod/iPhone has no initial battery charge, then the unit will not recognize it.

    iPod Compatibility Chart: The JVC KD-R840BT is "Made for iPod/iPhone" compatible and supports the following iPod/iPhone model features (as of 9/13/2013):

    Apple Device Generation Tested Version Media Type Control Type Display Type Bluetooth Charge
    Audio Video Head Unit iPod/iPhone External mode Pandora app Artist/Song Text Track Info Phone Audio Siri
    iPhone 2G 3.1.3 Y N Y Y Y N Y Y Y N N Y
    3G 4.2.1 Y N Y Y Y N Y Y Y Y N Y
    3GS 5.1.1 Y N Y Y Y Y Y Y Y Y N Y
    4 7.0 Y N Y Y Y Y Y Y Y Y N Y
    4S 7.0 Y N Y Y Y Y Y Y Y Y Y Y
    5 7.0 Y N Y Y Y Y Y Y Y Y Y Y
    5C 7.0 Y N Y Y Y Y Y Y Y Y Y Y
    5S 7.0 Y N Y Y Y Y Y Y Y Y Y Y
    touch 1st 2.2.1 Y N Y Y Y N Y Y N N N Y
    2nd 4.2.1 Y N Y Y Y N Y Y N Y N Y
    3rd 5.1.1 Y N Y Y Y N Y Y N Y N Y
    4th 6.1.3 Y N Y Y Y N Y Y N Y N Y
    5th 7.0 Y N Y Y Y N Y Y N Y Y Y
    nano 1st 1.3.1 Y N Y N N N Y Y N N N Y
    2nd 1.1.3 Y N Y Y Y N Y Y N N N Y
    3rd 1.1.3 Y N Y Y Y N Y Y N N N Y
    4th 1.0.4 Y N Y Y Y N Y Y N N N Y
    5th 1.0.2 Y N Y Y Y N Y Y N N N Y
    6th 1.2 PC Y N Y Y Y N Y Y N N N Y
    7th 1.02 PC Y N Y Y Y N Y Y N Y N Y
    classic 80GB 1.1.2 Y N Y Y Y N Y Y N N N Y
    120GB 2.0.1 Y N Y Y Y N Y Y N N N Y
    160GB 2.0.4 Y N Y Y Y N Y Y N N N Y
    video 5th 1.3 Y N Y N N N Y Y N N N Y
    iPad 1 5.1.1 Y N Y Y Y Y Y Y N Y N N
    2 7.0 Y N Y Y Y Y Y Y N Y N N
    3 7.0 Y N Y Y Y Y Y Y N Y N N
    4 7.0 Y N Y Y Y Y Y Y N Y Y N
    mini 7.0 Y N Y Y Y Y Y Y N Y Y Y
    Note: Apple iPod/iPhone software updates may change functionality results. If you download a newer software version, you may need to reset the head unit and your iPod/iPhone to regain functionality. If this doesn't work, you may need to wait until a newer software update is available.

    JVC Music Control (for Android):  By connecting the JVC CD receiver via USB to an Android smartphone (OS 2.2+) that has the free JVC Music Control app installed, it allows you to list and search all of the songs stored inside the smartphone from the receiver by artist name or album name. The JVC Smart Music Control app also analyzes all of your songs that are in your Android smartphone, and creates a playlist according to your mood. Once the application has completed the analysis of the songs, simply move the on-screen "mood ball" to your current mood, and this application will generate a list of songs that most fits your mood. Your compatible Android smartphone must be recognized as a USB mass storage class device; not compatible with MTP protocol.

    Drive Change Mode (for BlackBerry): The receiver's USB port also supports playback from BlackBerry smartphones (via USB mass storage mode). JVC's Drive Change Mode lets you connect your BlackBerry smartphone (that uses an external memory card) directly to the head unit, via USB. Drive Change Mode will let you switch between your BlackBerry smartphone's internal and external memory (such as microSD Card), so you can listen to music stored on either memory. You'll continue to be able control basic playback functions; such as folder/file search, play/pause, and skip next/previous; regardless of memory type.

    Front-Panel Auxiliary Input: A front-panel stereo minijack is provided to allow the connection of almost any portable audio source with a 3.5mm headphone output (great for those non-Apple/Android devices. Simply connect your portable digital music player to the unit's front-panel auxiliary input, and you can listen to the audio from the portable player through the speakers in your mobile audio system. The unit's front-panel auxiliary input can be turned On or Off.

    AM/FM+Pandora+SiriusXM Radio

    RDS AM/FM Tuner: The JVC KD-R840BT features a built-in RDS AM/FM tuner with manual, seek, and preset tuning. The Radio Data System (RDS) feature displays radio broadcast information such as artist, title, and album when listening to compatible AM/FM stations. You can store a total of 18 FM stations presets and 6 AM station presets (manually or automatically).  The head unit's Radio Timer features lets you tune into a preset station at a specific time regardless of the head unit's current source (you can activate the Radio Timer once, daily, or turn it completely off). If an analog FM stereo broadcast is hard to receive, you can manually switch the tuner to Mono operation. You can also switch the tuner's IF filter to Wide or Auto to increase/decrease the sensitivity.

    Note: You can set the built-in AM/FM tuner between US standard and European tuning spacing.

    Pandora Internet Radio: Pandora is the leading Internet Radio music service in the United States, giving people music they love anytime, anywhere, through personalized radio stations. The JVC KD-R840BT CD receiver lets you playback and control the Pandora Internet Radio music service that is being streamed to your Apple iPhone or Android smartphone. Your iPhone or Android smartphone will need an active Data Plan account with connection to the Internet via 3G, EDGE, or WiFi. In addition, you will need an active Pandora music service account.

    • Smartphone Connectivity: The JVC KD-R840BT supports playback of the Pandora app via your USB-connected iPhone or Bluetooth-paired Android smartphone.
      • Pandora App for iPhone: The KD-R840BT provides complete access to your Pandora account using your iPhone, via the head unit's front- or rear-panel USB port. To access Pandora you must have an Apple iPhone (iOS5 or later) with the latest version of the Pandora App from Apple's iTunes App Store.
      • Pandora via Android: The JVC KD-R840BT lets you playback and control Pandora Internet Radio streamed from your Android smartphone, via Bluetooth (no hard-wired connection required). To access Pandora from the JVC head unit, your Bluetooth-enabled Android smartphone must have the latest version of the Pandora App from the Google Play App Store. Your Android smartphone must support A2DP, AVRCP, and SPP Bluetooth profiles.
    • Pandora Control: The JVC KD-R840BT will provide control over the Pandora music service streamed to your USB-connected iPhone or Bluetooth-enabled Android smartphone.
      • Station List: You can select Pandora stations from your Station List by date or alphabetically (A-Z).
      • Create New Station: New stations can be created based on the current songs or artists playing on Pandora.
      • Skip Songs: You can skip song tracks within a station. You cannot skip back to a previous song. Pandora limits the number of skips allowed.
      • Thumbs Up/Down: You can give songs a thumbs up or thumbs down to help Pandora personalize stations to suit your preferences.
      • Bookmarking: The song or artist currently being played can be bookmarked & stored in your Pandora account.
    • Information Display: The JVC KD-R840BT will display Artist, Album, & Song information provided by the Pandora app on your iPhone or Android smartphone.
    Note: Access to the Pandora service will depend on the availability of a cellular and/or WiFi network for purposes of allowing your iPhone or smartphone to connect to the Internet. Pandora is not supported in Canada and only available in the United States.

    SiriusXM Ready: The JVC KD-R840BT comes ready for SiriusXM programming with access to XM and Sirius Satellite Radio stations. Thanks to its proprietary SiriusXM Connect port, you can add the optional SXV200V1 SiriusXM Connect tuner and receive more than 150 channels of exclusive programming directly from SiriusXM, via the "SiriusXM All Access" package (subscription required). Visit for a complete list of subscription options and channel guide. Additional features of the SXV200 SiriusXM Connect tuner include:

    • Channel list displays a list of all available channels
    • Category Search searches for channels in a certain category
    • Displayed Information such as Channel Name, Artist Name, & Song Title can be viewed on the head unit's LCD
    • Up to 18 SiriusXM Satellite Radio station presets
    • Direct Tuning via included remote
    • Supports the SiriusXM Instant Replay function, so you can pause, rewind, and replay up to 30 minutes of live content
    • Channels containing unsuitable content for children can be blocked

    Note: A separate SiriusXM Satellite Radio subscription is required (operates on the XM Network). However, you can easily add this SiriusXM tuner to an existing Sirius or XM account for a Multi-Radio Discount Plan.

    Audio Section

    24 Bit D/A Converter: The JVC KD-R840BT utilizes a 24-bit digital to analog converter for superior sound quality.

    MOSFET Amplifier: The KD-R840BT is equipped with a MOSFET amplifier. Compared to conventional power supplies, the MOSFET amplification circuit is smaller and more efficient, and it delivers increased power with less distortion and absolutely zero on/off switching noise. More power means louder and cleaner music at higher volumes because you're not pushing the limits of the amplification circuit.

    CEA2006 Compliant: The power specifications for the KD-R840BT are compliant with the CEA2006 Mobile Amplifier Power Testing and Measurement standards from the Consumer Electronics Association (CEA). These standards were developed as a way to equitably compare power specs from model to model and between manufacturers. The power output specs for the KD-R840BT are as follows:

    • CEA2006 Specs: 20 watts RMS x 4 channels (at 4 ohms, 20Hz-20kHz, 1% THD-N)
    • Maximum Power Output: 50 watts x 4 channels (200 total watts)

    Amplifier Gain Control: When you are using the KD-R840BT with factory speakers (or those rated to less than 50 watts peak), the Amplifier Gain Control can limit the amount of power being sent to those speakers. When the Amp Gain Control is set to "low," the volume control ranges from 0 (minimum) to 30 (maximum). When using speakers rated higher than 50 watts peak, you can set the Amp Gain Control to "high," and the volume control will range from 0 to 50.

    6ch/4V Preamp Outputs: The KD-R840BT is equipped with 6ch/4.8V preamp outputs (Front, Rear, Subwoofer). The front and rear preamp outputs allow fader control, while the subwoofer preamp output is non-fading.

    Subwoofer Controls: The head unit's sub preamp output features a low pass crossover and independent volume control. You can set the cutoff frequency of the low-pass filter at 55Hz, 85Hz, or 120Hz. You can adjust the head unit's subwoofer level between -8 and +8 (separate from the main volume level).

    High-Pass Filter (for Front & Rear Speakers): You can activate a variable high-pass filter (100, 120, 150, Hz or Through) for the unit's front & rear channels (speaker- or preamp-level), so low frequency signals are cut off from your system's front & rear speakers.

    Pro EQ: The KD-R840BT is equipped with JVC's Pro EQ. The integrated equalizer offers 7 preset sound modes (Flat, Natural, Dynamic, Vocal Boost, Bass Boost, & User) suitable for the music genre of your choice. The User mode allows you to manually adjust the head unit's 3-band parametric EQ (Frequency, Level, and Q-Factor).

    Pro EQ
    Frequency Level Q
    Bass 60, 80, 100, 200 Hz +/- 12 dB (-6 to +6) 1.0, 1.25, 1.5, 2.0
    Midrange 0.5, 1.0, 1.5, 2.5 kHz +/- 12 dB (-6 to +6) 0.75, 1.0, 1.25
    Treble 10.0, 12.5, 15.0, 17.5 kHz +/- 12 dB (-6 to +6) Fixed
    Note: You can store Pro EQ bass, middle and treble tone settings for each source (CD, AM/FM, Aux, USB, iPod, Bluetooth, and Pandora).

    Bass Boost: The unit's Bass Boost enhances low bass frequencies.

    Loud (Loudness): This feature boosts low and high frequencies to produce a well-balanced sound at a low volume level. You can set this feature to High, Low, or Off.

    Volume Adjust: The input level of each source (other than FM) is adjustable relative to the FM radio volume, so there isn't a significant volume difference when changing sources. Each source is individually adjustable from -5 to +5.

    Key Beep: The in-dash head unit provides an audible beep to confirm button operation. This function can be turned On or Off.

    Display Features

    Detachable Face: The JVC KD-R840BT features a detachable face to deter theft (a hard plastic face case is provided). An optional soft face case (142DFC1X, sold separately) can also be purchased for this unit. A face-fixing screw is supplied for making the face non-detachable, if desired.

    5 Zone Variable Color: The head unit's variable color illumination is separated into 5 Zones (LCD, rotary dial, button zone 1, button zone 2, and button zone 3). The KD-A845B offers 29 color presets and custom colors for each of these zones. You can choose one of these color presets or select the ColorFlow mode which scrolls through all 29 color presets. Additionally, there is a User preset, allowing you to individually adjust the intensity of Red, Green, and Blue from 0 to 31; resulting in approximately 30,000 custom color options. You can choose to use the same color for all 5 Zones, or use a different color for each separate Zone.

    • LCD Zone: The LCD zone refers to the head unit's LCD screen.
    • Rotary Dial Zone: The rotary dial zone refers to the unit's rotary volume control.
    • Button Zone 1: Button Zone 1 contains Phone, Menu, Source/Power, Back/Return, Next/Previous Track buttons.
    • Button Zone 2: Button Zone 2 contains EQ, Display, Preset 1, Preset 2, and Preset 3 buttons.
    • Button Zone 3: Button Zone 3 contains Preset 4, Preset 5, Preset 6, and Eject buttons; along with USB port backlight.

    Lighting Effects: You can select a preset color change pattern/speed for all zones (LCD, rotary dial, button zone 1/2/3). Choose from Spectrum, Groove, Techno, Emotion, Relax, and NightSweep.

    5 Zone Brightness Control: The unit offers a daytime and nighttime brightness setting for the LCD, rotary dial, button zone 1, button zone 2, and button zone 3. You can also adjust the brightness level of each zone manually from 0-31.

    Color Guide: When activated, the Color Guide mode changes the display and all button illumination to white when menu settings or music list search are performed.

    Auto Illumination Dimmer: The display/button illumination dimmer can be set to Off (normal brightness at all times), On (display/button illumination is always dimmed), or Auto (display dims when 12-volts is applied to the orange/white illumination lead).

    Remote/Bluetooth Control

    Wireless Remote Control: The KD-R840BT comes supplied with a wireless remote control (RM-RK52). The remote contains Attenuator, Sound, Source, Tracking, and Volume functions. The remote operates off of a single CR2025 3V Lithium-cell battery (included).

    Steering Wheel Remote Compatibility: The head unit features an OEM steering wheel remote control input wire (blue/yellow) within the included wiring harness that lets you keep your vehicle's factory radio steering wheel remote controls when used with an optional steering wheel audio control adapter (sold separately). Please consult Crutchfield's Outfit My Car to see if your vehicle is compatible.

    Our Product Research Team

    At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

    Q & A

    Customer Q&A

    4 questions already asked

    I forwarded your question to an Advisor and they responded with the following: If two phones are connected at the same time, whichever one is in use first would take priority over the other. For example if Phone A receives a phone call then Phone B will not be able to receive or make a phone call via Bluetooth. Same goes for the audio, if Phone B is playing Bluetooth Audio then Phone A would not be able to stream audio via Bluetooth. Unfortunately we no longer stock this radio, and I'm not sure if we have another model that will allow two phones to be connected at the same time. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy  Mar 22, 2014 ]  Staff
    I have had no issues with radio reception with this unit however, I live in the Atlanta area so I do not go through any rural areas. When I was installing the unit, there was an extra wire on the antenna adapter but nothing anywhere said what that wire was or what it was for. I finally figured out that it was a power wire for the antenna. After I hooked that wire into the remote power wire in the back of the unit, I had no issues with reception. [ CASEY  Feb 18, 2014 ]
    Great sensitivity, I get my country stations all over my area and up into the hills here in northern cali! Hope this helps [ JAMES  Feb 17, 2014 ]
    You will get better sound quality when bypassing the factory amplifier. However, that will require you to run the wiring harness from the radio location to the amplifier location. Please contact an Advisor by phone or chat for more details on your installation. [ Jeff  Nov 22, 2013 ]  Staff
    I have a similar question before buying and that is about how easily the pairing happens. I am looking for instant/automatic pairing, Assuming my bluetooth is activated on my phone. [ Colin  Mar 21, 2014 ]
    If you purchased the receiver from Crutchfield, feel free to contact our Tech Support team. They can help check walk through the settings on the receiver and see if there may be a fix. [ Jeff  Nov 18, 2013 ]  Staff