Customer Reviews

Clean Sound, no bass punch.

The JL Audio RD900/5 is a clean sounding amplifier. Setting the input/output gain limits is much improved. However, I find the amp lacks SPL (sound pressure level) as compared to JL's older models like the Slash line (JL 500/5). With a retuning of my DSP (digital sound processor) I was able to accomplish comparable sound quality. The quality of the sound is clean and loud, but I find it lacks that SPL bass punch I had grown accustomed to with the JL product line.

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Does exactly what it's supposed to do

I've replaced the Bose system in my '03 Silverado extended cab with this amp and it's working just fine. I'm powering a set of Infinity reference door speakers (components in front and coax in the back doors) with a JL W3v3 sub (6.5 inch 150 watts rms @4ohms) in the center console and it works great! It's a HUGE step up from the Bose system in terms of both clarity and volume. One gripe I have (that I also have with many other amps) is the set screws are significantly smaller than the rest of the wire connection terminal, so unless you prep your speaker wires with a significant amount of solder, you only may be clamping on a couple strands of wire rather than clamping on all the wire strands, Even though that's normal practice, it gets a star knocked off for that. It would also have been nice to have some better mounting options. As it stands, I've used some wood screws to screw it onto a piece of plywood that I've epoxied to the back wall of my cab. Otherwise, it performs perfectly and is 100% stealthily mounted behind my rear seat with 4 gauge running under the sill plate, through the firewall, and straight to the battery with a ground attached to a seat bolt. With the exception of the aftermarket radio and tweeters in the A-pillars, the build is entirely invisible and sounds MILES better than the stock Bose system. It won't pound your chest with the single W3v3 sub, but the amp could easily power a pair of 10's under the back seat should someone want to go t

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At long last a quality 5ch

I've always wanted something jl and a five channel Amp. So I killed 2 birds, here. I'm using it to add 6 or 8 additional speakers in a diy box, to my scion TC. My scion has the rare radio with rcas on back and with this even the original car speakers not connected, seemed to improve. So far I have 1 pair of infinity 6-1/2s connected. It is a big noticeable difference. Good bass and great voices on pumpkins 'tonight '.My birthday is next month so I'm just getting a pair every check.

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JL Audio RD900/5

Using this to power two 10" subs and four 4x6 mids and two tweeters in a 2001 mustang. Everything is running around 60% gains and has plenty of power. Super nice amp, have zero complaints.

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JL Audio RD900/5

Crisp clean power. Ran two 6 x 8, two 6 x 9 rear deck Rockford Fosgate with two 12 inch power bass subs. Loud and clear ford Taurus.

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This amp rips n tears!

Phenomenal amp! Cant beat JL quality, this thing rips and tears! Rippin and tearin, rippin and tearin...

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If only...

Don't get me wrong, THIS IS A GOOD AMP. The amp build and sound quality are amazing although total value I think could be better. For example, the level control knob, I feel, should be included especially for that price. I do also wish the level control knob could be selectable for different channels instead of just for the subwoofer. My amp also doesn't include mounting hardware or anything of that sort which is kind of a disappointment. If only it had that, this amp would be so unstoppable.

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2015 Corolla - Compact and Plenty of Power

Awesome product! Upgraded from a Rockford mono block (sub amp) and an old school JVC Digifine 4-channel amp (from the late 90s, for the main channels). I use this JL amp to power the Infinity Kappa 603CFs in the front, Alpine coaxial rears, and 2 old-school 10" JVC Digifine subs (bridged to 2-ohms) from the late 90s (my advisor Rucker knows all about em!!! :) ). This amp makes the main channels sing, and definitely puts out plenty of power to make my old subs thump. No issues at all with setup, very clean layout, and I've gained trunk space back. I'm impressed with the ease of use, and power output in such a small amp. I'm not looking to be the SPL champ; I'm in it for the sound quality, and when the urge calls to put the windows down and crank it - this amp has delivered. I love the ease of setup and tuning with the input sensitivity, built-in indicator lights. I'm very satisfied with this amp (and my advisor Rucker), and would recommend them to all.

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JL Audio amp ..will not disappoint

This is why i love JL Audio...Amazing!!! Going into this audio project I had a few requirements: clean power, adequate power, and buy once /cry once. I wanted a clear, accurate system with just enough bottom end. I experienced JL Audio many decades ago....they did not disappoint then...and I knew they would be my go to amp and sub components. I have this connected to a factory head unit with the JL Audio speaker-to-RCA convertors (high level input) powering Focal 6.5' components (60hz hi pass), Focal 5.25" Coaxial (80hz hi pass), and a JL Audio HO110RG-W3v3. Going into this...I though I would keep this at a moderate listening level (10-15) ...and just enjoy an great sounding system on my commutes.....haha... that lasted for about 5 minutes...then cranked the volume to 20...30.....40. ooh yes, this amp provided it easily....and stayed nice and cool. If your looking to update your factory system with better speakers and Sub....this should definitely be on your radar.

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Makes my speakers sound crystal clear.

I've had this amp for 3 years and I can say I finally got to push it by playing my system full blast for more than 5 hours in my backyard a few weeks ago. Only reason I had to turn it down was because I got the cops called on me for noise disturbances. The cops even complimented on how clear and loud it sounded and how they were able to hear me down the street. I'm using it to run some kicker 6.5 QS and some pro tweeters, kicker comps 10s the 07 models in a sealed box in my Chevy single cab obs. This JL Rd makes my speakers sound crystal clear and pumps up deep and impactful bass. I was hesitant about running a class D for my mids/highs since I had run other class D amps and just didn't like how they sounded. The clipping light is useful and convenient. Along with all the connectors in one side. I would definitely buy this amp again.

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Disappointed

I bought a scratch and dent unit. I got it and finally got a chance to hook it up. It doesn't work. Will be returning it

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SQ Power with a little SQL!

I ordered this after my 2020 Camry XSE wasn't doing the audio Thrills since I am a former SQ competitor and avid audiophile. This all in one package hit the mark for space saving and ease of installation. I like the power and separation this amp has and JL has hit the mark. They made my Audio Frog Speakers come to life in a big way. You will not be disappointed with this amp.

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JL Audio RD900/5

Hooked 3 of these up in a Mustang Mach e and they are amazing! 2700W in an EV and this plays so clean and smooth. I used the JL Audio TWK 88 and D8 for front and rear dsp tuning and just an incredible sound. Thank you to the Crutchfield sales/service staff. Initially had some problems with one of the amps and they replaced it promptly, no questions asked! I will definitely be coming back for any future projects. JL Audio makes some great products, but Crutchfield takes it to another level.

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JL Audio RD900/5

5 stars

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JL Audio RD900/5

Expected nothing less from JL didn't even need 2 but they look amazing sitting next to each other. Paired with a minidsp 8x12 and some focal K2 3 ways for some great sound. Crunchfield had them to me within a week no issues very happy.

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Thankful

The support and the knowledge here is above 5 star!

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Great 5 channel amp

I have this amp in my '85 Bronco powering 4 Polk Audio DB series speakers, and a Kicker 12" Comp sub with 12" passive radiator in a downfire enclosure. This amp provides plenty of power for clean sound at all levels, and is plenty for me with the setup I have. Plus the amp looks good, which I like since I don't have a concealed space to mount it in. Couldn't be happier with it.

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JL Audio RD900/5

This 5 channel amp is perfect and fits under my rear Jeep Wrangler LJ seat better than I thought

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JL Audio RD900/5

Added the punch I was looking for out of my midss. The clipping light is very useful

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JL Audio RD900/5

Just got it hooked up the other day, Sounds awesome.

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Great choice!

This amp was just what I needed. I have speakers in all 4 doors plus a sub. I wanted a single amp for everything, and this one fit the bill. Sound is excellent. More than enough to fill my vehicle with great music.

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JL Audio RD900/5

awesome sound

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versatile amp

Great Amp. it allowed me to pump 75 watts RMS to each speaker and 500 watts RMS to the subs. Awsome!

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Well worth the $$

Great amp. Easy set up to optimize its performance

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JL Audio RD900/5

Fits under my Rear Seat of my Four Door Truck.

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Great Amp!

JL Audio is quality, and performance. I am very satisfied with the RD900/5. The sound quality is amazing. Setup using the test tones to adjust the gains was easy, and worked very well. Sound from 0 to max volume is distortion free. You could not go wrong purchasing this amp, and I highly recommend it!

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JL Audio RD900/5

This is the first amp I have bought from here it was great service. This one s a top notch product. I mean it's jl audio come on. There is a reason they are the best. No need to pro/con there is many of pros and only one con ( it was not free).

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JL Audio RD900/5

This amp is amazing. Second time I use it and it does not disappoint power is there and so is the clarity.

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JL Audio RD900/5

Crystal clear sound. powering morel 602 virtus bridged and the jl audio 2x8 sub box

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Class D for the win

I'm not one to write reviews but I felt compelled to help someone based on my experience. Started with a kicker 5 channel, the. Rockford P1000X5. They both got extremely hot during normal operation. Tested with a temp gun 140-150 degrees. Because they are class A/B combined with D. Old technology. Mind you two different Crutchfield reps recommended me these amps until I spoke with a Crutchfield installer who said go full class D and it won't get hot. Well he was right. This amp barely gets warm compared to those amps. Wish I would've known this sooner. Class D and JL for the win !

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JL Audio RD900/5

Best amp for a great price! When e everyone was out of stock or thry boosted prices, Crutchfield came in for the win!

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Money well spent

Excellent build quality! Simply amazing ??!

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JL Audio RD900/5

Awesome stuff more than our previous amp as far as power and says it's way less. Super clear

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Solid amp

Very happy with this amp. I prefer a 5 channel for simplicity. Front two power Focal integration series 5.25 separates, rear Focal 6.5 coaxial. Sub is a 2 ohm down firing kicker 8inch with passive radiator. More than enough power. Clean sound.nice Amp

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Great amp with very easy setup

Amp performs as expected and was easy to set using the clipping lights. Using a single amp instead of two made wiring and installation much easier. Powering 4 GS682 AudioFrogs and two JL Audio 12w0v3-4 subwoofers.

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One of the best apps i ever had

Excellent product, very customizable for a lot of applications

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Bang for your buck

I have done few stereo installs before but this was my first amp install and it was as simple as plugging it in. The amp sounds excellent powering Infinity Kappa Perfect 600 with 3 way upfront and 2 way in the back. It's also running Focal 8" sub behind the rear seat. It fit perfectly in the rear under-seat storage bin in my Tacoma.

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BUY IT !

so happy ! door speakers sound amazing and the sub hits hard !

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JL

Me encanta!! Es la primera vez que tengo un amplificador JL y la calidad del sonido es asombrosa. Ya antes habia probado la marca, pero en bocinas y las tengo desde hace 8 años y siguen de maravilla , como solo JL sabe hacerlo. I love it!! It's the first time I have had a JL amplifier and the sound quality is amazing. I have tried the brand before, but only with speakers, and I've had them for 8 years and they continue to sound wonderful, as only JL knows how to do.

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Crutchfield response on 4/22/2021

Translation provided by Crutchfield's International Sales and Support team.

Good Amp

Very good quality and easy to understand installation instructions.

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JL Audio RD900/5

Superior quality is what JL is all about and this amp is no different. Plenty of power for my Polk 6.5" components and Jl 12TW1-2 sub and it fits nicely under a seat out of the way.

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Love it

Awesome powerful amp. Lots of info out there to make sure it's set up correctly. The clipping light makes it so anyone can do it!

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JL Audio RD900/5

Excellent power for all in one complete system .

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JL Audio RD900/5

Rocks hard and very easy to set up

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JL Audio RD900/5

Perfect amp the best

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JL Audio RD900/5

JL amps never disappoint!! Plenty of power without getting crazy on needing to upgrade the battery/alternator. Pushes my Kicker Comp R 12's perfectly all while running four other channels. The only Amps I ever buy.

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JL Audio RD900/5

Small but power

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Excellent sound , easy setup!

First time doing a full install on one of my trucks, with so many solid choices the JL RD900/5 was recommended to me by a friend who is an installer. Glad I made the choice, this thing makes everything come to life! Running 2 sets of Audio frog GS682 speakers and a cs110lg tw3 10" JL sub enclosure in a regular cab super duty and it sounds killer! The install and initial setup was super easy, the led clip indicator lights make it almost fool proof even for a DIYer. Give it a shot you won't be disappointed, great amp for the price range!

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JL Audio RD900/5

Handle all my speakers and sub superbly!!

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Plenty of clean power.

I paired this amp with some Focal ICS series speakers in the front and rear doors, as well as a JL Power Wedge 10" subwoofer. The result is outstanding. Sound is crystal clear and the bass is excellent. There is plenty of power. I use a Pioneer AVH-W4500-NEX as my head unit. I am Very pleased with the results. Excellent sound, superb bass, and flexible control!! Couldn't be happier!!

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Clear Sound with Power

Outstanding amp for my Durango with 6.5 JL components in the front, 6.5 Polk 2 ways in rear, and 12 inch Kicker sub. Much clearer than the Kenwood 50x4, 500x1 amp that I tried first.

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JL Audio RD900/5

Easy installation, easy adjustment. Very well built. Powers my Focal speakers and 10" w3 no problem

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Worth it

The amp is great, just as advertised! I like how Crutchfield's site lets you input your car info and then only things compatible with your car show. Things maybe a tiny bit more $ here vs other online retailers, but the overall buyer experience is better here. Crutchfield includes vehicle specific directions for install so it was less confusing to do my own install. I have the amp in my 2011 Subaru Legacy 3.6R limited, it powers all my door speakers plus my JL 10" sub no problem. If anything, the amp might too powerful for my door speakers.

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Another great JL Audio product.

JL Quality is always great. Could've got something cheaper but knew in the back of my mind I prob be wishing I went with the JL. Powering dash 3 1/2's, door 6x9's and rear door 6.5's along with a single 10" sub. Sounds awesome. I didn't want something to rattle the license plate off more of a good solid sound and I have achieved that goal. It's plenty loud in fact alot louder than I will ever play it. What I like about it is its crystal clear and the bass is tight and solid.

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Best 5 Channel Amp

Let me save you time and money. If you are thinking about getting this amp do not hesitate. I've been through several amps in the last 6 months and this has everything you would want. I listen to a wide variety of music and this amp delivers clean, quality and true reproduction from whatever source you use. I've had the Pioneer DX975, Kicker 44KXA8005, Rockford Fosgate T1000X5ad and a Boss PV3700. Nothing comes close to the JL Audio. Easy install in a nice, clean, compact package. There is no need for a subwoofer volume control because it's not amplifying garbage frequencies. Everything sits right where it's supposed to. I can't say enough how great this amp sounds.

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JL Audio RD900/5

Very satisfied with the amp so far. Set up was fairly easy and the compact size worked nicely with my 2001 Ram 1500 under the rear seat. I was able to set gains with the test tones from JL Audio's website before I hooked up the speakers. The clipping LED's were very handy in doing this and getting the gains set to a safe level that would prevent clipping or distortion. i currently have this amp connected to 4 coaxial speakers (Kenwood KFC-174's) and a JL Audio 12in Stealthbox. More than adequate power for my listening needs. Huge improvement over the sound coming from my Pioneer MVH-S522BS.

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JL Audio RD900/5

Shipping was super fast and I cant say how awesome the sales and the tech people are!. Stereo sounds awesome now. Thank you!

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JL Audio RD900/5

Very powerful amp!

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JL Audio RD900/5

Well made and simple to setup.

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JL Audio RD900/5

got it all wired up and found out it is defective. Sending a new one so hopefully no issues

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Fantastic Amplifier

Fantastic amp. I never uses class D for door speakers. Always a class A/B but I can honestly say the SQ is great with this amp. Clean and more power than I need. It's powering 2 focal access 10" subs and focal access components up front and co ax in the rear. Fit under my drivers side seat in my Subaru with ease. Very happy with it!

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Simple and effective

Easy setup. Like having clipping indicator lights. I imagine it'll work even better as I tune it in.

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JL Audio RD900/5

Great amp. User friendly. Clipping LEDs make set up a breeze.

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JL Audio RD900/5

Great / easy install!

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JL Audio RD900/5

Clean amplification when paired with a fix86 with my stock civic head unit.

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JL Audio RD900/5

such a breeze to set up..... stock speakers in the back deck and new 6.5's in the front doors..jl sub out back...WONDERFUL...SOUND !!!!

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Review

Quality Amp

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Perfect replacement Amp

Great replacement for my old XD 500/5. I can tell a big improvement. Plus, it's 2:3 the size.

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JL Audio RD900/5

Easy to install and tune. Super happy with it

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Excellent 5 Channel Amp

Easy Install. Great sound. Tuning process is a breeze.

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JL Audio = Top of the line!!

This amp is as advertised. Did NOT disappoint. It made my speakers come alive like promised. I can't tell you how happy I am to have this as the core of my system. Can't wait to add a sub and max it out!! Definitely would recommend this amp!!!

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JL Audio RD900/5

Very nice amp it made my JL 6.5 speakers and sub sound awesome

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Easy installation

Easy installation and sleek design. Versatile amp. I'm using this for 2 front speakers and the sub. With the clipping indicator gives me reassurance that I'm not exceeding its limits. Not 5 stars because I had to use a different Allen wrench than the provided one for a few screws.

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JL Audio RD900/5

This is running some Hertz Energy components and an Audiofrog 12" sub. My goal is sound quality rather than volume, but this can still play my system way louder than I want to listen to. I'm a big fan of the clip indicator lights and really like how easy the controls are to access from the face of the unit because it makes adjustments really easy. One of the issues with 5-channels is they often don't put out much power on the sub channel. One of the reasons this amp really appealed to me (other than being highly rated in listening reviews) is the 500 watts at 2 ohms. If you're looking for a 5-channel, def give this some consideration.

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Clean design and smooth sounding amplifier

So far so good, I was hesitant at buying any other amp other than JL. In the past I've owned Slash, and XD series amps and was always happy with the sound quality. I have only recently heard of the RD series amps. I'm driving Hertz Audio Coax all around and a Pioneer prefab sub box (10") in my 2016 Nissan Murano. The amp runs CLEAN and COOL. Very quiet turn on and turn off, excellent installation location for all adjustments and input wires. Simple and clean look which makes the amp even more astonishing. It reminds me of German Engineering for some reason. Give it a test drive, definitely very happy with my purchase. I was going to get the 400/4 but am really glad I spent the extra money and got the sub outputs. Signal sensing didn't work all that well, only detected my turn on a couple of times. Spoke with JL and they obviously recommended hardwired Remote. So I did and it all worked fine after that.

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Great power for the size!

This amp delivers enough power for a complete 4 satellites + 1 subwoofer. I've got it hooked up with JL C3 525 front, JL C2 525 back and a 10W3-D4 JL sub in the trunk on my 2017 Fiat 500. I have to say, the sound is crisp and clean on mids and highs. The lower bass lines and beats sound good, but sometimes it feels like missing more bass. The size is perfect if you have little room like i did. The looks is very sober, clean and elegant overall. The clipping setup is awesome! works perfectly. Overall a very good amp!

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engine noise ruins my entire experieince

After reading other reviews i must be the unlucky guy. In short the amp does everything it says it will do and i love the built in lights to help setup the amp properly to avoid clipping. My 2 star rating is completely based on the issue of engine noise that has proven impossible to resolve . I replaced my JL XD700 5v2 with this. So as you might guess it was pretty much plug and play. Same rca's, same power/ground wiring, NOT the same performance. I work at a Toyota Dealership and always have my gear professionally installed (work perks). they've gone through a number of different exercises to try to isolate and irradiate the engine noise to no avail. I'm so unhappy with this purchase. Its been explained to me by the Crutchfield tech support team that just because one amp worked fine with my existing setup doesn't mean another one will but i don't really understand how that doesn't point directly to a shortcoming of the new amp.

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Crutchfield response on 8/21/2017

Once we saw this review, our Tech Support team reached out to Rodney to help him further. We'll either help him get the amp working the way it should, or help him return it for an exchange or refund.

JL Audio RD900/5

Absolutely love the amp. Upgraded all speakers with Rockford fosgate and added 12" sub. Wow!!! 2013 Jeep Wrangler unlimited with top off or on sounds incredible. Highly recommend.

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JL Audio RD900/5

A little bulky, but packs a powerful punch and sounds crisp and clean.

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Sounds Great

Ok I have had this amp hooked for about 2 days now and I am not disappointed! I do have a sound processor hooked up as well (kicker front row) but everything sounds loud and clear. The highs are crystal clear and the lows are not too bad either. It hits hard and does not use much power at all and does not get too hot. I would recommend this amp because it has more than enough power to run you entire system. 500 watts to the subs is more than enough me. So if you need more than that this might not be the amp for you.

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Loud and clear mids/highs sub channel so-so

Crystal clear on the mids and highs but the sub channel is a little underwhelming. I have it pushing two 10W1V3 4ohm subs and it pushes them ok, but not as well as the Rockford Prime 500/1 I was running on them with before.

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JL Audio RD900/5

Nice clean sound at all levels!

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Clarity at its best!

This is an awesome sounding amplifier, compact and powerfull

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JL Audio RD900/5

Was skeptical at JL's new amp lineup, but figured I'd roll the dice and see what happens. Ended up re-doing my amplifier setup in my Acura RSX. Went from a 4 channel & mono channel sub amps, down to a single 5 channel. My setup is JL XR 6.5" components, C2 6.5"s, 10W6V2, 4 gauge power wire and monster cable RCAs. The sizing of the amp is truly amazing of how things have progressed in the car audio world. This 5 channel is almost as big as the 4 channel that I replaced which was an audiophile, not a big name brand amp. First and foremost - the sound: Not sure if it was me, but this amp made my speakers come to life. Not only with power like my old setup, but clarity. If you are worried that this amp isn't going to good enough for your audiophile expectations - have no fear, this amp is great and at almost half the price of JL's more premium lineup. I would definitely recommend this amp to anyone, especially if you are on a tight budget. Don't let the RD series fool you, its't going to be tough to decipher between the XD/HD sound quality to the naked ear.

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JL Audio RD900/5

I put this 5 channel amp in a 2000 Toyota Tacoma ext cab. Also and new receiver, 2 front door speakers, 2 rear speakers, and 10" JL Audio Sub. This Amp made my system complete. After adjusting to the Amp to the perfect sound for me. Good highs and Mids and just the right amount of base. Everything sounds great even turned up to loud for my ears. I'm up in my 40s like listening to; ole and new country, classic rock, pop rock, even some new pop. I have sons between 18 and 22 yrs old and now they want a 5 channel amp instead of there Mono signal channel amp only pushing there subs. I have played with electronics for 30 yrs. and this is a sweet amp

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