Skip Navigation

Pioneer GM-D1004

Compact 4-channel car amplifier — 45 watts RMS x 4

39 Reviews | 21 questions - 47 answers


Our take on the Pioneer GM-D1004

Pioneer's GM-D1004 4-channel amplifier will power your front and rear speakers with 45 watts RMS each — that's almost three times the power of a typical factory radio or aftermarket receiver. Even better, this compact amplifier runs so efficiently that it can often get its power from the same circuit as your receiver, saving you some wiring hassles. And its tiny size means you can install it almost anywhere, even behind the dash in many vehicles.

Double the power, double the fun

Pioneer's GM-D1004 4-channel amplifier will power your front and rear speakers with 45 watts RMS each — that's almost three times the power of a typical factory radio or aftermarket receiver. Even better, this compact amplifier runs so efficiently that it can often get its power from the same circuit as your receiver, saving you some wiring hassles. And its tiny size means you can install it almost anywhere, even behind the dash in many vehicles.

You can bridge a couple of the GM-D1004's channels together and drive a subwoofer with 90 watts while still powering a pair of front speakers. Universal harnesses let you get signal from an aftermarket receiver's RCA outputs or a factory radio's speaker wiring.

Important note: If your car receiver's power circuit is protected by a 15-amp or larger fuse (check your fuse box or owner's manual), you can tap into it to power your GM-D1004. Otherwise, you'll have to run a power wire to the battery. Be sure to add a 15-amp inline fuse as close to the battery as possible.

Product Highlights:

  • compact 4-channel car amplifier
  • 45 watts RMS x 4 at 2 or 4 ohms
  • 90 watts RMS x 2 at 4 ohms (4-ohm stable in bridged mode)
  • CEA-2006 compliant
  • Class FD amp technology
  • universal harnesses let you get signal from RCA outputs or speaker-level wiring
  • can run off same power circuit as receiver (must be 15-amp or more)
  • switchable front and rear high- and low-pass filters (80 Hz, 12 dB/octave)
  • fuse: 15A
  • 10-gauge power and ground leads recommended, when necessary
  • dimensions: 8-1/8"W x 1-9/16"H x 2-9/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • 4-Channel amplifier
  • One 15 amp mini blade fuse (installed)
  • 8" Line-level input harness (proprietary plug on one end/four female RCA jacks on the other)
  • 39" Speaker-level input harness
  • 39" Power/Output harness
  • 2 Mounting brackets
  • Two 3/4" Self-tapping screws
  • Owner's manual (English/ French/ Spanish)
  • Warranty information

Easy to install and has a good amount of power! Since it's so tiny I could actually fit it behind the dash, so the included cables were long enough

Anonymous, Salt Lake City, UT


Pioneer GM-D1004 Reviews

Average Customer Review(s):

(39 Reviews)

Pioneer GM-D1004

Anonymous from Salt Lake City, UT on 3/10/2018

Crutchfield Customer Review (What's this?)

Easy to install and has a good amount of power! Since it's so tiny I could actually fit it behind the dash, so the included cables were long enough

Pros: Small size


Pioneer GM-D1004

Anonymous from Detroit, MI on 12/4/2017

Crutchfield Customer Review (What's this?)

The right amount of power for me



Decent budget amp

Mark from Bethlehem, CT on 11/16/2017

Crutchfield Customer Review (What's this?)

Pretty much what I expected in a budget, compact amp. Installation was easy. Sounds pretty good, but not great. Again it's a budget amp so you get what you pay for. Connection cables a little cheap but so far they work! Basically what I expected. Definitely improves the sound in my system!

Pros: Compact, easy installation

Cons: Cheap connecting cables

Pioneer GM-D1004

Anonymous from Herriman, UT on 11/12/2017

Crutchfield Customer Review (What's this?)

The amp fit perfect on top of head unit inside the fairing of my Harley. Plenty of power.



Pioneer GM-D1004

Anonymous from Las Vegas, NV on 11/6/2017

Crutchfield Customer Review (What's this?)

Good product plenty of power. Just need better details when I asked. Took to shop and had installed.



Pioneer GM-D1004

Anonymous from Lethbridge,Ab. on 10/16/2017

Crutchfield Customer Review (What's this?)

Excellent product. The sound was night and day difference I would suggest this product to anyone.



Pioneer GM-D1004

Anonymous from Trenton, NJ on 9/20/2017

Crutchfield Customer Review (What's this?)

Crystal Clear. Just enough power for what I needed. Installed behind the glove box on my Honda Odyssey.



Little amp with a great punch!

Richard from St. Croix, US Virgin Islands on 8/6/2017

Crutchfield Customer Review (What's this?)

This is a fantastic little amp. As indicated by others you need to run a batter supply lead but you should do that for ANY amp. Was easily able to tuck this behind the kick plate under the steering wheel of my 2015 Wrangler unlimited. Drives my kicker component speaker without any issue and sounds fantastic. Highly recommend if you are looking for a simple amp with great sound that is super easy to conceal.

Pros: Awesome little Amp that sounds great and is super easy to conceal. Also easy on the wallet!

Cons: As indicated by others the gain is not adjustable but this is not a problem if being used as a 4 way Amp. I would NOT recommend using as a sub Amp but otherwise a great little amp that is totally worth its low low price tag.

Perfect for Jeeps

Brady from Aldie, VA on 7/8/2017

Crutchfield Customer Review (What's this?)

Perfect size when space is a concern. Easy hookup and sounds great. Crutchfield helped me plan out my system and I couldn't be happier.

Pros: Size, price, and again size.

Cons: Nope

Pioneer GM-D1004

Anonymous from Bothell, WA on 7/3/2017

Crutchfield Customer Review (What's this?)

If you are looking for an amp which is very easy to hook up and will give you just enough power for clarity - this is it. No need to run cable from the battery - use the same 15 amp fuse for the battery. In my 1997 Mustang GT convt. - I mounted under the passenger seat. Too easy. I love this amp.



Acceptable performance but I'd rather not recommend it.

Vishruth from Nova Scotia on 6/19/2017

After about a year of use, I'm still not sure if this was a good idea. The heat (+25 deg Celcius) in the summer is the likely cause for one of the channels to produce a fairly audible noise, even when on zero volume. And in the winter, when it is -10 deg C or lower it takes a while, like 20 mins, to be able to operate in quiescent state. It is still better in summer than in the winter. If you can get you hands on a better product for a slightly higher price then go for it. And if you are debating between amp'ing your factory head unit instead of replacing it with an aftermarket stereo then don't waste a single moment more. Just replace the factory head unit with any aftermarket stereo; even a $80 single din would be a much better idea.

Pros: Saves you money by allowing you to keep your factory head unit. Plenty of Power. Unlikely to produce noticeable distortion up to 90% of power.

Cons: Narrow operating temperature with consistent performance (-5 deg C to 20 deg C). S/N is very mediocre.

Nice little amp!

Rich from Winlock, Wa. on 6/12/2017

Crutchfield Customer Review (What's this?)

I installed this little guy in my Jeep TJ for a little extra sound. I currently have a low end Pioneer head unit with Polk Audio speakers. It made a very noticeable difference in sound quality. It's very crisp and clear. Nice added volume as well. Small package fits nicely under the steering wheel behind the metal panel that's just behind the trim panel. There was plenty of wire and the instructions were straight forward.

Pros: Nice sound improvement, small and easy to find a mounting location. Wire were long enough for my Jeep TJ. Looks well built. Nice instructions.

Cons: At this time there are no cons!

'98 Harley FLHTCUI

Paul from NC on 5/25/2017

Crutchfield Customer Review (What's this?)

Installed to Kenwood receiver to push four 5 1/4" Polk Audio speakers on my wife's Electra Glide. Wow! Why did I spend the money I did on my system? This combination sounds better than my upgraded aftermarket system specifically designed for a Harley.

Pros: Easy installation Compact Works


Fantastic product

Rich from Strongsville, OH on 5/17/2017

Crutchfield Customer Review (What's this?)

Great product. I was a little skeptical at first primarily because of the size. Totally surprised! Fantastic sound difference from head unit. Would highly recommend.

Pros: Elevates sound to a fantastic level.

Cons: A little confusion with wiring

Small and Powerful

Shayne from Louisville, KY on 3/26/2017

Crutchfield Customer Review (What's this?)

Bought 2 and wired each bridged for the higher wattage. Easily able to hide in the front dash area. I did power direct instead of from radio power. Clean and powerful speaker output. Matched with Pioneer 8200NEX and some Alpine speakers, as well as an Alpine powered sub. I have bought some quality items and now have high end sound. These amps really helped a lot.

Pros: Powerful, small, and efficient. Easily concealed. Comes with everything needed to install.


Lack of control

Nunya from Sacramento, CA on 3/5/2017

Crutchfield Customer Review (What's this?)

Only issue with it is that the gain is not adjustable. It's set a little to high and I get clipping pretty easily. Other than that, it was extremely easy to install in a small area which was perfect for my needs.

Pros: Extremely easy to install, small footprint

Cons: No control of gain leaves sound quality a little sub par.

Pioneer GM-D1004

Chad from Baton Rouge on 3/2/2017

Crutchfield Customer Review (What's this?)

Fantastic compact amp. Installed under the passenger seat of my 2015 Miata powering a set of Focal IS-200's.

Pros: Plenty of power and very small

Cons: None


Ryan from Birmingham, AL on 1/9/2017

Crutchfield Customer Review (What's this?)

Essential! Sounds great at all volumes Adds the volume you want Very easy installation Easy to hide in car I bought a Kenwood headunit (the DDX3 series) and thought it's 22watts RMS would be sufficient as I've been happy with similar RMS values in the past; it was not sufficient and the result was a lot of popping and distorting at moderate volumes (about 2/3rds the way up). I like my music loud and clear and just wasn't pleased. After adding this tiny power pack, the system can now get uncomfortably loud (yet clear) - this is exactly what I was looking for. The amp has no gain knob and sounds good at 100% volume (again but very loud) with no distortion. I'm running Alpine E-Type component speakers in the rear and factory VW components in the front (the VW's do distort slightly at about 95% volume, fading rearward corrects this. Added the alpines to get tweeters in the rear). Installation is a breeze, simply connect (splice) the power, ground, and remote lines from your head unit to this, connect RCA cables, and then connect all the speaker wires to the power pack. I'm also running a 600w RMS alpine R type sub located behind my seat. System sounds about perfectly balance though I suppose I could always use more bass. I'm not using the provided LPF but the head unit does LPF at 80hz rear and 100 hz front.

Pros: Sounds Great Goes to '11' (it's capable of loudness) Easy installation Ties into HU power source Tiny - easy to hide HPF/LPF Affordable

Cons: None

Pioneer GM-D1004

Phil from Delphos, OH on 1/4/2017

Crutchfield Customer Review (What's this?)

Cosmo designed this system to install in my two grandsons 2007 for door ford pickup. They installed a new radio, amp, subwoofer and door speakers. The install went perfect with all parts working as planed. Great job Cosmo and Crutchfield.



Pioneer GM-D1004

Anonymous from Strasburg, PA on 1/2/2017

Crutchfield Customer Review (What's this?)

wont work well unless powered by battery otherwise it cuts off when cranking up the base. Overloads very easy don't let them tell you you can tap power from headunit 15amp....overall ok but only for the basic set up not real good for 4x45w as stated no gain control and if you want subwoofer output you have to bridge two outputs then you no longer have a 4x45watt amp

Pros: small

Cons: overloads easy

Dynamite comes in small packages

Terry from Columbia, SC on 11/16/2016

Crutchfield Customer Review (What's this?)

So I decided to keep my Head Unit for my 2011 Dodge Challenger R/T which happens to be the Media Center 130 RES. It has enough for the time being (MP3/Sirius XM/CD/AM/FM/BT etc) The Pioneer GM-D1004 seemed like a great though temporary, upgrade. This is a truly versatile little guy with a lot of power packed in such a small package. If you've looked at the product description then I really don't need to repeat all that. It was very easy to install. Now let me add some important info to make your install a lot more easier, especially if you are using a speaker input connect to a factory head unit. I had to search all over to find the wire diagram so I knew before having to trace wires or test wires or however you want to do it. If you can find factory wiring, it becomes so easy. This was so much easier to install than your typical amps since it can use your head units power supply. Wires, wires every where; don't be intimidated! Let me back up, the best thing you can do is pull out your unit, check your wiring, and look around for a new home for this little guy. I did a preinstall, meaning I looked at wiring, figured where I was going to put it and the started to wire the harness. For me, I put it in the space right below my head unit. make sure you trim to fit! if not you may have a lot of excess wires.

Pros: Easy to install very versatile (I have set as 4 channel) A lot of boost from such a small package As long as you have an idea of how you will use, this makes install so much easier.

Cons: Not so much a con but, make sure you know where it's going to alleviate overcrowding wires.

2016 f150 xlt

John from Rochester, MI on 9/29/2016

Crutchfield Customer Review (What's this?)

I opted for the basic stereo because of cost when I ordered my f150 knowing I could upgrade for way less so I have the xlt with 7 speakers and the small screen the sound was crap. So I installed new front and rear speakers with kickers, removed the center dash speaker ( not sure why it's there ) and installed this amp because the stock stereo wasn't loud enough for me, now my system sounds incredible it's loud and clear.all the wirin was done with the connector behind the CD player and didn't have to run to the battery or have to hook up the remote wire, for under 300 bucks your system will blow away any stock way overpriced system

Pros: Sounds great small enough to mount anywhere behind stereo

Cons: Directions are weak but Crutchfield service emailed me stock unit wiring diagram

Pioneer GM-D1004

Anonymous from Bozeman, MT on 9/22/2016

Crutchfield Customer Review (What's this?)

Great product. Easy to fit behind dash. Made my speakers sound significantly better.

Pros: Small, easy to hide in car.

Cons: Wiring should all be on one side, not on both.

Great basic amp

Ted from Rome, GA on 9/14/2016

Crutchfield Customer Review (What's this?)

This amp does a great job to make a factory radio sound better. (I also upgraded from factory 25W to Pioneer 50W speakers.) The unit itself is very compact so that allows for easy install options. The instructions were good. Anybody with basic DIY skills can install.

Pros: Small size, good price, good upgrade from factory radio.. really improves sound quality. Now you can drive with windows down and still hear music well.

Cons: If you want to win a competition or 'impress' (aka annoy) others with a rattling trunk, you'll want something more powerful.

Really Nice Little Amp

Hunemid from Waverly, IA on 7/26/2016

Crutchfield Customer Review (What's this?)

Small powerful and you can put it just about anywhere you want.

Pros: Small clean and reasonably priced

Cons: Would be kind of nice if the wiring was all on one side

Compact, powerful and clean!

DmArt from Kalaheo, HI on 7/24/2016

Crutchfield Customer Review (What's this?)

Hides behind double din headunit in my 07 civic sedan. Nice fit. Clean insatllation. Noce sound

Pros: Strong! Clear, cheap, compact

Cons: Amp gets warm but car a/c temp regulates how warm amp gets so no prob for me

Pioneer GM-D1004

MartyC from Macon, GA on 7/24/2016

Crutchfield Customer Review (What's this?)

I used this amp in a small 60 Qt Cube size Cooler with a pair of 7" speakers in one cooler, and a pair 6X9's in the other one. It has a LOT of power bridged in to Two channels, 90W RMS Clean Power. Being that it is a Class D amp, it doesn't put a drain on the battery so I get long play time with it. Small, compact size made it perfect for my need. Lot of power in a small size !

Pros: Class D so does not pull too much power from battery in my application, (Cooler radio)

Cons: none

Great Little Amp

Jesse from Baltimore, MD on 7/8/2016

Crutchfield Customer Review (What's this?)

After a lot of back and fourth (not wanting to do all the wiring), I decided to install this bad boy in my Tacoma to compliment my new JBL club 6x9 components and 6 1/2's. The speakers were and awesome upgrade over the terrible Toyota factory speakers, and the Entune head unit actually didn't sound bad with them at regular volumes, but WOW what a difference with this amp installed, as others said, it "woke up" the speakers. It's super clear and they KICK! With that said, I'm a late 30's guy and just wanted good sound (I play it loud only occasionally). A few things to note: 1. You do not need an amp kit unless your radio is fed with under 15amps. If mine was 15 I probably would have used one, but it is 20amps. If you do use a kit, you can get the cheapest one because even 12 gauge is overkill per Pioneer (I called them) 2. This amp runs warm; I put it under the steering column so it could have some breathability. I'd discourage tucking it in the dash especially above the factory head unit. 3. Lots of wires to connect. Contrary to what you read, the speaker-level inputs work fine (it sounds amazing, and way louder). This amp was really designed for that application to augment factory systems. As long as your in-dash isn't low grade, you'll be fine.

Pros: Small, cheap and makes a huge impact in the volume and clarity of the sound

Cons: Runs warm, tricky install with 19 wires to hook up.

Worth it!

Christopher from Milltown, NJ on 7/7/2016

Crutchfield Customer Review (What's this?)

I was not originally going to install this amp with my new Pioneer AVH-4200NEX but after some research and recommendations I bought it and installed it and so glad I did. It is so compact I was able to install it behind the head unit. It really powers the Focal IS 690 speakers in my truck! I can now listen to crystal clear music with my windows down on the highway!

Pros: Compact Size Does not take much power so you can splice the power going into head unit to power this amp

Cons: Gets pretty hot

Great little amp!!!!

William from Miami, FL on 5/27/2016

Crutchfield Customer Review (What's this?)

Great addition to factory radio and speaker. Great sound improvement. My guess it will be better when you upgrade the factory speaker.

Pros: Easy install.

Cons: Not enough installation info in manual.

Works great just as you expect a Pioneer product to do.

Mark from Southside, VA on 5/11/2016

Crutchfield Customer Review (What's this?)

I installed this in my 2005 Mustang base V6. It has 6x9 Kicker speakers in the doors and rear deck and a stock 2008 Mustang radio. This really woke up the Kicker speakers and I am pleased with the sound. Be prepared to spend some time on the install, there are 19 wires that have to be connected! 8 speaker wires in, 8 speaker wires out, plus ground, switched hot, and 12V. Soldering wires in the dash where the radio goes is a slow procedure. I put mine in the dash on the metal framing between the radio and glove box.

Pros: compact design, good power, Pioneer quality

Cons: tedious install

works good

Matthew from NY on 5/4/2016

Crutchfield Customer Review (What's this?)

works good gave it 4 stars cuz it dose get lil warm but works really well

Pros: powers my speakers good and makes them sound way better

Cons: gets a lil warm

" Really impressed"

Jason G. from Tampa, FL on 5/1/2016

Crutchfield Customer Review (What's this?)

Great little amp. Easy to install. Really woke up my mids and highs. Kenwood head unit couldn't compete with image dynamics 12" sub. Now the system is balanced and sounds great.

Pros: Small size, clean power, easy to hide.


Good amp!

Mark from north wilkesboro, NC on 3/3/2016

Crutchfield Customer Review (What's this?)

This is a great amp for door speakers however an amp wiring kit is not needed for this because the power wiring is 14 awg and hard wired into the amps harness. You need a length of 14 awg wire to run this to your battery and ground as the wiring included is only about 36" long. I also bought an inline fuse from my local auto parts store and used it near the battery. Feel free to ask me about this!



Pioneer GM-D1004

Chan S. from Antelope, CA on 2/16/2016

Crutchfield Customer Review (What's this?)

This little amp is so small, you can literally fit it anywhere. I wanted a small amp for my door speaker upgrades and this did the job. Very easy to install, I just hooked it up to the radio, there is no need to hook the power to the battery. I was able to fit this under the steering wheel of my 2014 Tacoma and it was a perfect fit/well hidden.

Pros: Small and easy to find a place to hide it.


GM-D1004 Amp

Jim from denver, CO on 2/9/2016

Crutchfield Customer Review (What's this?)

Although the first unit did not work, Crutchfield promptly sent me a new one. Crutchfield is awesome.

Pros: Compact size and performs as advertised.

Cons: First unit defective

Best small amp I've installed.

Lawson from Seattle on 12/19/2015

Crutchfield Customer Review (What's this?)

So low profile it fit in my glovebox with plenty of room to spare! It really cleaned up the signal coming from the head unit and distortion is nearly eliminated.

Pros: Can be installed practically anywhere and keeps your system discreetly tucked away. Low pass and high pass options provide a lot of control and versatility.

Cons: RCA inputs are short and require extra cable and an extra connection.

Pioneer GM-D1004

Chuggs from Guam on 8/12/2015

This is a great amplifier. It doesn't require an amp kit, and it is so compact that it could fit practically anywhere. This amp really made my highs and mids sound more crisp. I highly recommend this product.

Pros: Compact No amp kit needed Small but powerful

Cons: None

Great Pioneer Amp

Scott G from California on 7/6/2015

Crutchfield Customer Review (What's this?)

This small Pioneer amp was a great addition to my 1988 Toyota extended cab pickup. With its small size I was able to hide the amplifier out of sight while still producing great sound to the set of 4" and 6"x 9" speakers. The fact that it doesn't have gain adjustments is great as its really just a plug and play device for your stereo system. You don't have to fiddle with trying to get the gain structure right between the front and rear channels, its just ready to rock and roll.

Pros: -Its small size makes it versatile to install the amplifier in many locations without compromising any valuable real estate in a vehicle -The price is great for what it does to your sound system

Cons: -None


Hands-on research

Product Research


CEA 2006 Compliant: The Pioneer GM-D1004 4-channel amplifier power ratings are measured according to the Consumer Electronics Association's CEA-2006 standards. These standards allow you to accurately compare the rated power output of all CEA-2006 compliant amplifiers, even from different brands. Manufacturers who adhere to the standards can display the CEA-2006 logo on their products and packaging. CEA-2006 Specifications:

  • Power Output:
    • 45 watts x 4 at 4-ohms with <1% THD+N
    • 45 watts x 4 at 2-ohms with <1% THD+N
    • 90 watts x 2 at 4-ohms with <1% THD+N (bridged)
  • Signal to Noise Ratio: 74 dBA

Class-FD Amp: A Class-D amplifier offers higher power in a smaller chassis than conventional Class-AB amp designs. Pioneer's Class-FD design not only delivers full-range Class-D amplification, but is more efficient than other designs. The compact design provides many installation options.

Channel Layout: The GM-D1004 is a 4-channel amplifier; both halves are bridgeable, so it can be wired as 4-channel, 3-channel, or 2-channel.

Auto Turn-on: When using a speaker level input, a signal sensing circuit will automatically turn the amp on and off along with the source unit.

Input Select Switch: The amplifier's input select switch allows you to choose between 4-channel and 2-channel mode. The 2-channel mode only requires connections to the front inputs.

Gain: The amplifier gain is fixed:

  • RCA input: 28 dB (1.0 volt max input)
  • Speaker level input: 8 dB (10 volt max input)

Crossovers: The front and rear amplifier sections have independent crossover controls; each has can be set to low pass, high pass, or off (full range). The crossover points are fixed at 80 Hz and the slope it 12 dB/octave.

Power/Output: The power, ground, remote turn-on, and speaker output wires are housed in a single harness.

Signal Input: Use one of the included input harnesses, line-level or speaker-level.

Dimensions: The approximate amplifier dimensions are:

  • Width:
    • 7-1/4" (chassis)
    • 7-3/4" (including wiring)
    • 8-1/8" (including mounting brackets)
  • Height: 1-1/2"
  • Depth: 2-1/2"

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

Crutchfield asked  
Why did you buy this?

brand/compactness/price [ MICHAEL A  Mar 15, 2018 ]
Easy install onto factory radio. [ Lit  Feb 27, 2018 ]
Tyler recommended this amp to power my new system [ Keith S.  Jan 02, 2018 ]
To give the sound a little boost for a soft top beetle [ Edsel  Dec 28, 2017 ]
To provide my watts to front and rear speakers. [ Steven  Dec 09, 2017 ]
Price and quality. [ JAMES E  Nov 26, 2017 ]
Great small amp, easy to hook up. I have put these in many cars and have not had any problems [ PHILLIP  Nov 21, 2017 ]
Compact size [ Mark  Nov 03, 2017 ]
Pioneer is great! and so is Crutchfield!! [ Joe  Oct 19, 2017 ]
Ease of installation and low cost were the primary factors driving this decision. My car is over twenty years old, it has plenty of rattles and road noise, so it can benefit from a little extra power, but it is not the ideal platform to invest in a serious high dollar audio system.....this should be enough to make driving more enjoyable and will likely serve me well for the remaining life of the car, without building a system that approaches what I paid for the car itself. [ MITCH  Oct 10, 2017 ]
Wanted a small amp for a pair of outdoor speakers on my Jayco Class C Seneca. [ David  Sep 11, 2017 ]
Small package big power [ Todd  Feb 25, 2017 ]
small and powerfull [ STEVEN I  Feb 14, 2017 ]
According to reviews about compact amps and per the recommendations of crutchfield associates this one is the easiest to install and sounds the best. [ Taylor  Feb 08, 2017 ]
Because it will be perfect for my mids and tweets [ James  Jan 05, 2017 ]
Perfect size to hide away. [ Michael  Dec 12, 2016 ]
Price and name of manufacture [ Rudy1517  Nov 08, 2016 ]
Recommended by online advisor. [ Roger  Oct 23, 2016 ]
Ive always liked the quality of Pioneer [ Loretta  Sep 19, 2016 ]
It something small [ Jermaine  Aug 25, 2016 ]
I went with this amplifier due to the compact size and power output. I am replacing the stock audio in my 2001 Mustang GT, and I wanted to use the stock placement for all speakers and amps. My vehicle came from the factory with the Mach 460 sound system which allows for these amps (I purchased two) to be placed in the same spots as the factory amps, which is hidden up under the rear deck along with the rear speakers. [ Scott  Aug 20, 2016 ]
The price and size was perfect. I wanted something with a little more punch than my stock radio. [ VTengineer  Aug 17, 2016 ]
It is the most compatible amp according to my speakers specs. [ Migdalia Nieves  Aug 05, 2016 ]
Good price on the amp... Plus I was looking for one small enough to hide up under the dash or behind a panel somewhere [ Jeffery M.  Jul 11, 2016 ]
size and power [ William  Jun 30, 2016 ]
First component in upgrading the stock system in my 04 Honda Accord for sound improvement. [ Ray  May 26, 2016 ]
Small form factor and bridging while not needing a new power wire run. Installed in the factory amp location of a saab 900 on a custom aluminum plate using the factory mounts. Works well enough, gains would have been nice but its pretty cheap so ill live. [ CHRISTOPHER  May 19, 2016 ]
Price and size [ N  May 16, 2016 ]
able to tap into existing vehicle power wire and not have to run a separate lead to the battery. [ michael  May 15, 2016 ]
Appears to be the compact type of amplifier I'm looking for to install in my '92 corvette. [ Anthony  May 04, 2016 ]
I read some of the reviews, this will give my door speakers the little boost I need. [ MIGUEL  Apr 29, 2016 ]
Price, compact, and advisor recommeded [ Julio  Apr 13, 2016 ]
Size and Features match my application (2008 Dakota Pickup) [ James  Mar 15, 2016 ]

21 questions already asked

No. Definitely not. Like most amplifiers, the Pioneer will operate at the presented impedance (within the acceptable range anyway) [ Ryan  Dec 02, 2017 ]  Staff
You can use rca inputs or speaker inputs (the wires that would normally run from your head set to the speakers). It Doesn't matter which you choose. You would want to choose the speaker inputs since your sub is connected to your only rca input. It is suggested that you run a separate power wire for the amp (instead of just using your radio power wire) if you choose to use the speaker inputs. [ Joseph  Aug 06, 2017 ]
It seems to me that this setting is in the audio unit and not that amp. Many give the option to set rear speakers as subs.if you scroll through the settings on screen, I think it's likely you'll be able to change it there. [ Guest  Jun 28, 2017 ]
Due to the detailed nature of your questions I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer all of your questions. [ Kenny  Dec 30, 2016 ]  Staff
The amp needs to be on a remote power or it will drain the power. [ SEAN  Nov 26, 2016 ]
Hi Tony, I installed this amp in my jeep about a year ago and have never had a problem with it draining the battery even when I haven't driven the vehicle for weeks at a time. I don't believe it is always on but admittedly haven't searched the documentation. Good luck with the system and Merry Christmas! [ Charles  Nov 26, 2016 ]
It is switchable. If you wire it through acc power it does not draw when vehicle is off. It is a nice little amp. I used it to drive the speakers in my jeep tj. [ Tad  Nov 26, 2016 ]
If you power the amp directly from the battery or a constant power source then the answer is yes, the amp will stay on powered all the time. This amp only requires a 12v 15amp circuit which is one nice feature. You can splice in any 15amp circuit that has KEY ON POWER. Use a multimeter or a test light if you have one or have access to one. A easy way to accomplish this is to look in your fuse box and find a 15amp circuit (minimum) and reference that to the fuse location in your owners manual to find this right wire to splice. And as always, if your not 100% confident in your abilities to do it. Take it to a pro. Its alot better than causing and fire or shorting out a component of your vehicle. I hope this helps. Good luck! [ Jonathan  Nov 26, 2016 ]
Dan, The instructions for installation are written for several devices, specifically for your vehicle. A large power supply line from the battery, linked to a smaller incoming wire is a better situation than a small wire from the battery supplying a sip of current to a power hungry larger incoming wire. Just as the water line to the house is larger than the indoor pipes, a large supply line helps ensure adequate supply. With a water line, too small of a water supply line will only cause a low flow and not a hot wire fire in your dashboard. I ran the heavy gauge wire from the battery to the center console where I mounted the Pioneer amp. I mounted a wire block under the center console with the 10 gauge on the incoming side. I attached the 14 gauge to the other side of the block. Should I ever need another power supply, I now have a large 10 gauge feed running to a block with an open spot to attach another smaller wire. [ Joseph  Sep 28, 2016 ]
That is their recommendation when you connect ANY medium power amp DIRECTLY to the battery. The GM-D1004 is a low draw amp which can even be connected to the same power source as the stereo (it doesn't have to be powered directly from the battery) If you decide to go all the way to the battery, there are "terminal blocks" which allow you to connect one large gage wire (10 gage) to two or three smaller gage (12,14,16,18 gage). It's a waste of time and money though. [ Sean  Sep 22, 2016 ]
You can't. I ran 14ga wire. It would make no sense to run 10ga then drop to 14ga. It is important to run 10ga wire with a big amp. Hope this helps. [ GEORGE  Sep 22, 2016 ]
Try to ground as close as possible to the amp using a very good chassis ground I did mine to a bolt mount in rear area behind seat did clean off paint I did not use radio harness [ Allan  Sep 15, 2016 ]
Hi Dan W. Yes you can. I just grounded mine behind the head unit. This is a really nice amp not over powering. [ Charles K.  Sep 15, 2016 ]
Used the radio harness and sounds/works great [ KENNETH  Sep 15, 2016 ]
From my memory, the harness can splice in to the head unit/factory harness. It also can just be grounded to the car frame. Both work. I suggest grounding to the frame. It's less wires to tuck behind the head unit. [ Daniel Lawson  Sep 15, 2016 ]
I use the Power directly from the battery and it's OK to use the vehicle's harness groud for the ground. [ ABNER  Sep 14, 2016 ]
I don't recommend using the oem radio harness ground, find a chassis ground point close to the location of the amp and make sure to file away any paint for a good ground connection. [ Ian  Sep 14, 2016 ]
power 12 volt is the yellow wire and ground is black wire I ran mine to cigarette lighter socket just tied in wires to it the amp doesn't draw much juice no need to run to battery and all the leads are long if u use high input u don't need to hook up remote wire I fitted mine in glove box of a 91 dodge Dakota hope this helps. [ eric  Sep 14, 2016 ]
A powered subwoofer would have it's own built-in amplification so, no, you wouldn't connect it to an external amplifier. The Bazooka should offer "Speaker Level Inputs" so you can tap the factory amplified speaker wires to provide it with the audio signal. Many Bazooka models come packaged with their speaker level input harness and wire taps for this purpose specifically. I hope that helps! My Bio: [ Ryan  Aug 15, 2016 ]  Staff
This will depend largely on the factory capabilities of your F-150 and other parts of your system. Splicing wires is often required to install this Pioneer amp, but for more specific details on your installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to give you the details on what you will need for an installation in your truck. My Bio: [ Larry  Jun 02, 2016 ]  Staff
Yes, the harnesses for that type of set up are included. [ Kyal  Apr 10, 2016 ]
Yes it does have speaker level inputs. [ Robert  Apr 09, 2016 ]
input cables to radio if equipped , yes, can use any speakers, factory radio may not have input connections, I wired amp for door speakers, and used Pioneer radio for speakers in the dash. I hope this helps [ Allan  Apr 08, 2016 ]
This was what needed to upgrade my stock sound system. The pioneer has a inline input that is helpful to install this amp to a factory head unit like mine - Toyota Rav4 2015. Also it was very convenient to use the inline input where you don't need a remote line at all because inline input sensing to turn the amp on or off. [ ABNER  Apr 08, 2016 ]
I'm not sure what you mean by level inputs, but it easily connected to my factory stereo and after-market speakers. [ JOSHUA  Apr 08, 2016 ]
Yes it does. It has both speaker input and RCA inputs. It will work with either. It is a very compact amp. [ Louis  Apr 08, 2016 ]
Yes it has speaker level inputs. Comes with 2 adapters in back one for rca input and one for speaker level [ Joseph  Apr 08, 2016 ]
It does have speaker level inputs. My Dakota application is installed exactly the same as what you wish to do. Additionally, it has high and low pass filters, to limit highs or lows sent into the output, for a sub or to shunt your crossover points more efficiently. It also has a two or four channel input select switch, for ohms matching to either type of receiver. Comes with connector plug adapters and about 10" long wiring bundle to mate up the ends. It is extremely small and compact, making the install very easy. [ James  Apr 08, 2016 ]
Yes it does. It comes with two input harnesses, one for speaker level inputs, the other for front and rear RCA inputs. [ Ian  Apr 08, 2016 ]
Yes. Just make sure neither + nor - is grounded to the vehicle. [ Guest  Mar 22, 2016 ]
Yes, it does have a low pass filter, word of caution not much power for a large subs, 10s maybe. [ Adam  Mar 21, 2016 ]
Thanks for your question. For information on selecting the best sub I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the models and help you make the best choice for your system. [ Kenny  Jan 16, 2016 ]  Staff
The Pioneer GM-D1004 is a 4-channel amplifier but both halves are bridgeable, so it can be wired as 4-channel, 3-channel, or 2-channel. The amplifier's input select switch allows you to choose between 4-channel and 2-channel mode and you can find detailed wiring instructions for bridged/2-channel mode on page 8 of the owner's manual. [ Larry  Jan 13, 2016 ]  Staff
Mounted mine on the back wall of my glove box. Easily accessible and looks great. [ Ian  Apr 08, 2016 ]
I have not yet had the opportunity to install mine yet but I have looked at where Its going, and yes I am installing behind the radio, take into consideration what type of vehicle you have( I have a 06 f250), some smaller vehicles may have to have this placed somewhere else. I have also seen them mounted under the passenger side dash depending on heater core location [ dylan  Dec 21, 2015 ]
I tried in my Golf but there wasn't enough space. Also, to mount properly you'll need to have it against a flat surface with the ability to screw it down. Also, you'll lose the ability to change the HPF/LPF easily. I put mine in the glovebox and I couldn't be happier. [ Daniel Lawson  Dec 21, 2015 ]
that's why they give 2 ops for hookup high input or rca attachments if you're head unit is more than 1volt the use the high input when use the high no need to use remote wire. [ eric  Sep 14, 2016 ]
I jiust have a blue tooth JVC head unit and it works perfect with it, couldn't be happier. I wouldn't pay attention to the volts. [ SEAN  Dec 18, 2015 ]
I'm going to answer this way...most speakers can handle either one so it just depends on what you're trying to accomplish. I use the front channels at 45W each to run a left and right full range speaker and I bridged the rear channels to 90W to run a single 12 inch sub. It sounds great. [ Darrin  Oct 13, 2015 ]
The most important thing here is to use all 4 ohm speakers. This will elimate bridging and make the installation quick. Personally I would go with the 45 watt 4 ohm. For all four. [ PAUL  Oct 09, 2015 ]
Have not installed yet. [ JAMES E  Oct 09, 2015 ]
There isnt one. You can try to go through the reciver and adjust volume settings of it is capable. [ LUKASZ  Jul 10, 2015 ]
There is no "Gain" adjustment for this amplifier. You can adjust the frequencies between low and high using the filter switches for the front and rear channels, but that is all. [ Tad  Jul 09, 2015 ]
remote on this amp is two ways high input no need to hook up blue wire for remote. if u use rca attachment then u need the remote wire I found it easier to use the high input leads. [ eric  Sep 14, 2016 ]
I bought a dual amp kit from Crutchfield as I was hooking up a 1200W subwoofer, thus used an 8 gauge wire to the amp from a splitter. I wouldn't go much thinner than that. For remote power, 'simply' connect the blue remote wire from your source/head radio to the blue wire on the power/output wiring harness. Feel free to call tech support at Crutchfield. I've been on the phone with them for over an hour before to walk through wiring! [ Peter  Jan 12, 2015 ]