Customer Reviews

Much better than the standard amplifier

This was a great upgrade to the sound More bass better control of speakers Fit in behind dash and wiring was straight forward Great quality amp

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Clear mids and highs

Was skeptical when purchasing this little amp, but drastically made a difference in my vehicles mids and highs, so much more crisp and clean!

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Sony XMS400D

Works great

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Sony XMS400D

Sounds so much better. Off to a great start.

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Good sound quality over stock.

Perfect size to fit under dash of Ford Super Duty in factory location. Great amp .

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Sony XMS400D

Easy install, fits inside the dash. Only thing I'd change is to not have the ground wire including in the amps wiring harness.

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Sony amp

Easy install - excellent sound. Great option for a small/compact amplifier.

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Must-have upgrade!

I wanted to upgrade the overall stereo system in my gen-3 4Runner. I am not a bass-head, I just wanted louder, fuller & more crisp audio. I first replaced the factory head unit with a Jensen touch screen with Apple CarPlay. Then replaced front & rear door factory speakers with Kenwood 6.5 & 5.25 respectively. I was unimpressed with the lack of improvement. They didn't sound much different. Then tech/sales support at Crutchfield suggested this little Sony amplifier as an added boost to my setup. MAN! What a difference! My stereo system came to life. Obviously, those Kenwood speakers were just way underpowered. The sound is so much clearer with clean bass & sound. Now the difference is night & day! Not to mention, the amp was easily installed & rests tucked away behind my head unit & completely out of sight. Thank you Crutchfield tech support & sales team!

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Clean and plenty of power for its size

Excellent amp especially for its size. Super clean power. Installed behind my glove box on my wrx.

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Sony XMS400D

Easy installation.

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Sony XMS400D

Compact powerful

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Cool little amp

I like that it's compact however it does not function well, with four 3 inch speakers. Forget about running a pair of 5 1/4" and 6x9's. Probably more ideal for running two Channel instead of four. Overall, cool little amp. Just don't expect a whole lot from it.

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Compact amp w/ great sound

Compact amp w/ great sound. I am hoping that this Sony outlasts my twice replaced Alpine amp.

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Small, solid with really clear sound

This amp is surprisingly good. It is small and was very easy to install with speaker level inputs from the factory head unit. It replaced a Kicker Key Amp that I used in my older Tacoma and put into my newer 2022 Tacoma - somehow I fried the Kicker in the transfer. I bought this as a replacement and really do not hear any difference between the two, and this one is about $100 cheaper. There are not many options for adjusting the sound - there's no gain and the sound filters are very basic. All of that is okay with me because I wanted something simple and not overly intricate. I was just looking for an upgrade from the factory receiver. I have paired this amp with Hertz Uno 6x9 speakers and Kicker midranges up front and Hertz Uno 6 3/4 speakers in the back. The sound up front is perfect. The sound from the rear is much smaller, but I think that is the Tacoma's layout more than the speakers or the amp. The amp is very small and takes up very little space underneath the driver's seat. I am very happy with it, and I am not a huge fan of Sony overall.

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Compact power upgrade

Compact enough to fit behind the display screen in my 2017 GMC Sierra. You don't know that the amp is there. The truck already had aftermarket speakers installed. After amp install the system still wasn't loud enough for me. I replaced the speakers with ones that had 10 more RMS higher wattage and that put my project over the top. My advice is to use speakers with AT LEAST 60 watt RMS to get everything out of this amp. This made me love my truck instead of just like it.

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Sony XMS400D

Was the least expensive mini amp Crutchfield had at the time. Ended up working GREAT! Hi-level input to an Alpine head unit. Using Pioneer TS-G690 6x9 rear and TS-G650 6.5 fronts, sound came ALIVE in a Toyota Camry. Was able to tie-wrap it to the back of the Alpine. No sub but using the Hi-pass filter on the fronts and using full range on the rear 6x9's, was able to extract enough bass to make it pleasant. This would be a good set up for stock speakers too, but the inexpensive Pioneers are worth the upgrade, especially the 6x9's.

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Little Dude

Perfect little amp. Just enough power to drive a simple system. Very clean rich sound paired with sound ordinance speakers

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Some PDF instruction

How to connect this one on my 2024 Mitsubishi Mirage ES... Video or PDF please. I want to buy one.

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Great little amp.

The added punch was night and day. Best of all the amp is so small it fits in the dash with out anyone knowing it's there. Great little amp that is easy to live with.

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Sony XMS400D

great little amp, i was able to hide it under my dash and it sounds great.

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This thing is PERFECT

It's extremely compact, rugged, and puts out the power without a care. This happily runs four 6x9 loud enough to cause hearing damage all day.

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Bang on

As an enthusiast in the world of audio equipment, my experience with the Sony XMS400D has been notably impressive. This amplifier stands out in a crowded market with its blend of power, clarity, and reliability The Sony XMS400D features a sleek and compact design, which makes it versatile for various setups. Its build quality is robust, and the materials used give it a premium feel, ensuring durability over time. The understated aesthetics blend well with most home audio systems without drawing unnecessary attention. Performance is where the XMS400D truly shines. It delivers a clean and powerful output, providing excellent sound clarity and depth. The amplifier handles high volumes with ease, maintaining distortion-free audio. This makes it suitable for both casual listening and more demanding audio experiences. The integration of high-quality components ensures that every frequency range is well-represented, offering a balanced and immersive soundstage. Equipped with a range of features, the XMS400D provides versatility for various audio setups. The adjustable settings allow for fine-tuning to match different speaker configurations, and the inclusion of advanced protection circuitry safeguards the amplifier against potential damage. The connectivity options are well thought out, making it easy to integrate into existing systems. From a user perspective, the Sony XMS400D is straightforward to set up and operate.

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Great sound, especially considering the price.

Great sound quality for the price. Installed in my '09 Tacoma Double Cab with Pioneer AVH-2500NEX and Pioneer 6x9" component set in the front with Pioneer 6.5" coaxial set in the rear doors. Sounds fantastic.

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Not worth the money

Does not provide enough power for the money and the sound quality is meager at best.

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Crutchfield response on 5/13/2024

Christopher, we're sorry you're disappointed with your amp. Whenever you are not completely satisfied with anything you purchase from Crutchfield, please contact our Customer Support team at 1-800-955-9091. Purchases from Crutchfield can be returned or exchanged within 60 days of the purchase.

Sony XMS400D

Good power for such a small amp and no hissing or whining. Although I don't know for sure if the jack or wire hook up are rated at the same power

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Acton

This thing is tiny! I have never installed an amp so it was a bit of a struggle, but I was able to get it installed. I diyed a plastic mounting plate for it. It sounds great, extremely loud and with the new speakers I installed (P-67CB) the bass is fantastic. I was intending to add a jbl basspro nano, but idk, now I'm pretty satisfied with the bass without a sub. I highly recommend upgrading with this amp, especially if space is tight!

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Great for a factory stereo upgrade

Pleasantly surprised at how well this tiny amp livened up our factory stereo. Sound is clear and it's been trouble free so far.

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Sony XMS400D

Nice sound. Easy to install. Very small and easy to conceal.

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Sony XMS400D

Size is awesome! So small I was able to fit it behind the dash of my TJ wrangler. Sound is super clear and gets as loud as I could ever ask for!

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A Powerful Little Thing

The amplifier is working great so far and glad to have bought it for my car. I needed this since I have installed aftermarket speakers. After splicing a harness extension that I bought from eBay with the amp's wires, it was just a plug-and-play situation. Got it to fit inside of my head unit's compartment. Now, the speakers have more bass and decibels.

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Great minir upgrade for a midest system.

Works well cooking up to a factory system. Gives the added juice needed. Should be able to drive with the windows down just fine??. Will be adding Kicker door speakers just as soon as I can unwrap my" Christmas presents". I'm expecting an even better result with them. 6x9 front doors and 6-3/4" rear doors.

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Sony XMS400D

This little amp is an amazing product. I installed it on my 2023 Hyundai Kona SEL to boost the power of the standard factory head unit. It made a huge difference. The power is much better, the overall sound is greatly improved. Even the bass. It fit easily behind the dash . It did not require a special wire to the battery. I grounded it to a metal frame behind the dash. I connected it to a unused fuse on the fuse box inside the vehicle using a piggy back fuse connectors ( add a fuse). I did replace the factory speakers with 6.5" Rockford Fosgates. Also there is not any engine noise or alternator"whine". In short I highly recommend this amp for anyone wanting a boost in power from any head unit. For the price you cannot beat it.

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Sony XMS400D

This amp is marvelous and it was a great addition to the radio I purchased

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Not much difference in sound!

I had this amp installed and honestly can barely hear a difference. I'm going to replace the stock speakers and hopefully I will tell a difference then?

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loud and clear

I put this amp in with audiocontrol acx-bt1 and can already tell the clarity is improved even with the original speaker. Without the bose processing box and subwoofers working the speaker sound hollow but they play loud and clear without distortion. Was very easy to install in my car. I chose this amp over the other mini amps because of the dimensions. I drilled and tapped two m5 holes in the bottom of the old radio cage and this guy screwed right in. Most of the other models are ~9 inches long and would not fit where this one can. I connected the power to the "aftermarket connector" under my car dashboard, rather than out to the battery. It has a 20 amp unswitched circuit with fat wires and switched 15 amp for the wake up wire. Very easy wiring job. I am gonna get the sony es component speaker for the front door and now thinking about getting a DVC sub to hook up to the rear channel with a vette nuts box because I bet this little guy can handle it easily. I wish sony made DVC sub tho. I could not find anywhere whether the RCA jacks are male or female and bought some adapters. Well, they are all female so my F-F adapter were unnessa.

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Great small amp

I'll give it 5 stars because it does everything I expected. Gave my speakers a much needed boost in power to bring out bass and pretty much everything. It has more power than I need. My car already has a 15 amp fuse for the stereo. I did not wire directly to the battery. I have no issues with anything. I think because my head unit is the pioneer DEH-80PRS, on that unit I can turn off the internal amp- thus saving power for the amp. Maybe if I couldn't turn it off I would have to go to the battery with the positive lead.

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Awesome little amp dont let its compact size fool you!

Wow really made a difference! Sound is louder, cleaner and just overall fuller. Great product from Sony.highly recommend! Also it's compact size allows it to sit behind my Radio so that was awesome too!

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Great!

Works awesome. A lot of punch in a little box. Adapted to my 88 Thunderbird with premium sound.

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Great sound quality in a small package

This amp is small, powerful, sounds good, and is very affordable. You get a lot for your money. What you don't get is DSP (not expected for the money), the ability to use high pass on front and rear (this took me back a little), and no ability to adjust the gains (the amp doesn't have subtle differences in volume when paired with my factory radio; it is fairly loud by three clicks up on the volume). I was quite pleasantly surprised by the sound quality of the amplifier. It pairs well with components (which I'm not using because I don't have a factory tweeter location), and even at extreme volume, there's no hiss. This amp makes my music enjoyable, and I watched a dyno on a prominent video site, and it exceeds the advertised RMS ratings. It's really quite a deal. I'm certain there are better amps with more features, but clearly this amp will satisfy people who like it clear and like it loud. The only things I would change are the lack of gain controls and more flexibility in crossover setup (I used a DSP to set crossovers). I do recommend the amp, but I'm also thinking about replacing it to get the control I want but don't truly need.

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Great little amp

Great little amp. Easily doubled the power over my stock radio. Installed in a 2014 Nissan Sentra so not a plug and play. Had to cut and splice into the speaker wires but easily done with the wiring diagram found on line. Cut and splice into the wires behind the radio and mounted the amp to the underside of the glove box. Also spliced into the accessory wire supplied to the radio to also supply the power needed to turn the amp on.

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Sony Mini Amp

I installed this Amp in my 2022 Nissan Altima. The purpose was to give a boost to the Factory radio and to drive the aftermarket Rockfords I recently installed. I was not disappointed. This is a perfect solution to those who don't want to (or cannot) go through the process of installing larger amplifiers either in the trunk or under the seat. This fit right in the dash cavity in my car and the installation was straight forward. There was a significant improvement in overall sound and loudness. Well worth the effort.

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Great little powerful amplifier

This is a small mighty 4ch amplifier that produces great sound quality. It's accepts both hi and low pass inputs and has the auto sensing power turn on built in.

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Happy customer

Everything I purchase from crutchfield is excellent.

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excellent solution

Excellent solution for my needs. I just wanted to add some punch to my factory radio and speakers...while retaining all factory function. This little amp did it well. Not earth-shatter power, but a relatively quick and convenient (velcro securely in void in dash behind radio) way to add volume and bass. I might upgrade speakers next, but significant improvement as is. Great value for dollar.

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Sony XMS400D

This amp is so small I was able to put it in the dash behind my head unit. Installation was a breeze. Sound quality is good but I feel like I might have lost a little volume compared to just the aftermarket head unit and factory speakers. Of course I also upgraded the speakers which are not as efficient as the factory ones. The only thing worrying me is how hot it got after only playing for a short while at moderate volume.

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Sony XMS400D

The output of the head unit was easily doubled this was the simplest amp I have ever installed

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Sony XMS400D

Nice small amp

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Sony XMS400D

This Sony XMS400D really adds sound and clarity to my 6 x 9 kenwood 3 way speakers. The wiring that comes with this unit is easy to follow. The hardest thing I had to deal with was nothing to do with this sony amp. It was actually the existing factory wiring in my nissan frontier. The colors did not match up with the master sheet so I had to trace each wire to find the correct wires but once I did, I was so happy with the extra sound this Sony puts out, everything was worth it.

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Exactly what I was looking for

The reviews complaining about power or lack of adjustment from this amp clearly didn't pay attention to what they were buying. This is NOT a full feature, high power amplifier. My goal was to add more power to the door speakers using the factory 8.4 Uconnect in my 2014 Ram without tearing apart the interior to run cables and keeping factory look and functionality. This fit the bill perfectly. There is a noticeable difference in the "fullness" of the sound, along with a big increase in low and mid punch. The biggest difference is at low-normal listening level. I don't have to blast the volume to wake the speakers up anymore. Install was a breeze. I spliced the amp into the stock wiring behind the head unit and used resistors to trick the Uconnect system. This amp is so small I was able to mount it inside the dash directly below the head unit which made a super easy and clean install. Highly recommended your intentions sound similar to mine. If you're expecting more, this isn't for you.

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Sony XMS400D

Super convenient if you just need a little boost.

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Great little amp

I bought this for my toy hauler trailer. The factory head unit has 3 zones, but the third zone is very low power and that happens to be the zone for my two outside speaker. This amp is perfectly made for the rv application because it has the ability to turn on with the presence of a signal (since there is no ignition signal) and also it is low power enough to splice into the line power for the head unit. This amp has an RMS 3 times as high as the third channel of my head unit and it has increased the speaker performance by as much. The speakers are much louder, far better mid and low production and can run up to full volume without any distortion.

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A good upgrade over stock

For the price and size this amp is very practical for anyone trying to get some better sound from their speakers. It is more than twice as loud as my factory radio and makes the vocals clearer and the bass deeper. Install took about an hour in my 22 Toyota Tacoma.

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Sony XMS400D

The amp itself was easy to install, however, it is not powerful enough to push the speakers ordered as an overall upgrade to my factory setup.

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Excellent

This was my first time installing an amp and after studying the manual for my receiver an amp for the wiring the install was pretty easy. First this amp is simple as it gets, at it gets the job done. I have $40 front kenwood speakers and $60 pioneers and this amp makes them sound really good, proof you don't need to splurge on more expensive speakers. Its also very small which allowed me to tuck it behind the headunit in my 94 f150. You can't tell im running an amp at all, everything is well hidden and is really cool.

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Sony XMS400D

Easy install behind radio on the firewall. Added some "pop" to my inexpensive after-market head unit. Posi-Product connectors made the hook-up a breeze.

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Sony XMS400D

Works great and easy to find a place to mount

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2012 Silverado crew cab

I was looking for a 4 channel amp to get more performance out of my Fosgate door speakers (Prime R165X3) as a simple add-on without spending a bunch of money. My aftermarket head unit (JVC KW-M740BT) just didn't have enough power to push the speakers. Installation was really simple - especially after calling Crutchfield tech support when I had a question that I couldn't find an immediate answer to. I ended up placing the amp in the small compartment above my glove box and attaching with heavy duty velcro. Now, I get all the sound that I want from my door speakers - especially mid's and high's. For low end, I have a Kicker powered sub under my rear seat. I purchased everything from Crutchfield due to their rock solid customer service. Thanks Crutchfield!!

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Sony XMS400D

Super easy install and fit behind my factory head unit! Sounds great!

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Very happy

If your tired of running rca cable's and a remote wire to the back of your car Sony xms400d is a very small and compact and will fit any place for the most part I was hesitant because of the size but the sound is very surprising at higher volumes and very clear

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Sony XMS400D

Wow great sound and love how easy this install was RE: Ford Ranger 02 400 watts BABY

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Sony XMS400D

Excellent amp for the price and size. This was easy to mount in my dash along with the headunit.

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Awesome Micro Amplifier

Amazing little amplifier! Sounds great paired with a decent volume controller/head unit. The best part is all the connections are on connectors mounted to the PCB. No pigtails so the installation bulk can be kept to a minimum. I did re-terminate the RCA connections to be male end instead of female rather than use the included adapter and another set of RCA hookup cables to reduce bulk. The connector on the RCA side is a JST PADP-10V-1-S and uses SPND-001T-C0.5 or SPH-001T-P0.5L terminals in case anyone needs that info.

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Sony XMS400D

After discovering that my head unit was not putting out enough wattage to give a good sound to the speakers, I ordered this and I am very satisfied. My Infinity Reference 6.5 speakers now sound excellent in my car and providing great mids and highs with this small form factor amplifier. Fits perfectly behind the head unit in my 1999 CR-V. Would highly recommend and Crutchfield customer service is excellent!

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Omaha

Be realistic about what you're buying and you'll be very happy. $138.00 (at the time of this review) does not buy you a large 4 channel amp pushing gobs of power, but it is a significant improvement over your stock system. Plan on replacing the speakers to realize the full benefit though, I installed mine and listened to it with factory speakers and was so un-impressed I called Crutchfield to inquire about an exchange. Installed the new speaks and it came alive. In all I spent $1K even on this entire system, all entry level stuff, and it sounds great. To get significantly better would take another $400.00-$500.00 so you can build a decent system without breaking the bank if you want. BTW, Crutchfield support was pretty great.

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Great little amp

Pleasantly surprised. Swapped out speakers on 2013 CR-V with factory radio and almost no mids. Pathetic. Bought this beca didn't want to deal with a big amp. Was able to install behind the radio and now I can't even get the volume to full without it being too loud. Clean sound and plenty of power for my needs. Relatively inexpensive and sounds great.

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Sony XMS400D

Installed in a 2010 Subaru Forester. I decided to wire it directly into the factory harness as I have the stock head unit. Relatively straightforward to install if you know which wires go to which speakers. The included wires are pretty long so I zip tied them together to make the install neater. I kept the filter settings off as it sounded like they were unnecessary with my setup (4 normal woofers and 2 factory tweeters). I have the Hertz K170 components up front and factory speakers in the back (they're next up for replacement). The amp made the K170s sing like I have never heard out of them. Sound is much "fuller", especially at higher volumes. Using a wired AUX connection, I can really heard this thing do its magic. Great purchase and just enough power to round out the improved audio I wanted out of my system. Not looking to shake the car next to me (or my car for that matter) but rather just get better sound. This amp is perfect for that.

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No brainer

What a difference! This made all the difference in my system. Highs are crisper and lows hit so much deeper and everything in between sounds immaculate!

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Sony XMS400D

yo como nopal recomiendo este pequeño moustro que ayuda a ditruibuir el sonido con una exelencia que ase trababajar el resto del systema al 100% se escucha bien perron amigos. 5 estrellitas

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Very good for simple mini amp

Solid mini amp, no frills aside from a single LP and HP filter setting, but it's better at 45watts per channel than the usual 15-20 a head-unit gives. I was expecting a bit more performance considering I initially only had 16watts per channel on my JVC stereo, but the power boost is still very noticeable with clearer vocals and instruments across the full audio range. Do recommend if you're looking for a bit more power and/or you have limited space to install. The people giving this unit 1 or 2 stars either got a defective unit, didn't install it properly or had unrealistic expectations out of what-amounts to a basic power-pack. You're not going to get teeth ratting and door shaking performance out of amplifier the size of a large bar of soap and 45watts rms.

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Sony XMS400D

I never thought possible to find something this versatile and powerful!, i did all wiring on a bench with a harness so i didnt cut any factory wires, on my f150 was a fuse dedicated to factory amp on kick panel on passenger side so i run power from there. Sounds great, my music is alive again!!

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Sony XMS400D

Made my stock speakers come alive

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Sony XMS400D

Awesome for the size pretty impressed. The hide ability is great and east to mount. Defiantly recommend

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Great Compact amplifier

This worked great with my factory head unit and upgraded Hertz speakers in my 2020 Toyota Corolla Hybrid. It test at 55-60 watts per channel RMS at 1% distortion on multiple testings on YouTube. No need for a sub. Sounds fantastic. It fit in the dash and can be tapped into existing 15 amp circuit. No need to run wires through the firewall to the battery. Very happy with the results.

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Great amp

Tiny ass amp, but the sound improvement from it is incredible. Absolutely great product.

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Simple

Small enough to fit behind my Kenwood DVD receiver in my 2009 Ford Escape. No need for amp kit as I used the factory power and ground. Connected w 1.5 ft RCA cables as it was next to the receiver and attached it with 3M Velcro.

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Sony XMS400D

I bought this based on its size and its specs. I used it to improve the audio in my 2021 Goldwing. I also upgraded the front speakers to 5 1/14 JBL's. The sound is amazing and I can hear it clearly at freeway speeds. I installed in in the saddlebag and vented the bag as per Hondas instructions. It gets warm, but I haven't had any issues. (Live in Phoenix)

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Small size, solid power

Wish it had adjustments for gain or better filtering, but for the size and power it puts out its fantastic. Wired mine up 4ch with speaker level inputs into a 64 Chevy that has a cheap HU in the glovey-which was a ton of wiring this way, but it works like a charm. Probably overpowering the speakers a bit since they're all rated 30w RMS, and some expert reviews have this amp actually putting out MORE power than it's rated at by Sony, but I don't run it often and I'm not the type to totally blast it

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Sony XMS400D

Works great for. Little extra power. Hides away in the dash

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Awesome Amp

This is awesome. Fits anywhere and sounds great! Easy install.

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Small footprint amp

Great low power amp. Easy to hook up and conceal.

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Sony XMS400D

Small enough to fit under dash, powerful enough to make my new door speakers come alive!

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Very good in my opinion!

So I wanted a small amp to fit in my 97 convertible mustang without having to run amp/ground /rca's to the trunk. I previously had a alpine power pack in my 03 mustang and wasn't that impressed. I chose this sony amp for a change of brand and the ease of installation and to also bypass the Mach 460 stock amps. I have to say I am very very impressed with this amp. Yes it's just basically a booster amp for your head unit but man does it pack a punch. I was Leary about it not having any front/back level adjustments but I bought it anyway and like I said I'm very very impressed with the sound quality to my aftermarket speakers and also the stock Mach 460 tweeters. Very glad I made this decision on top of the bad reviews. I would definitely recommend it to power your speakers and let them sing.

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Compact, powerful, and simple

Super easy to install, fit inside of my dashboard quite nicely. Only took about an hour to install and that's including resoldering my wire harness and disassembling my dash. The sound quality is very good I find myself listening at much lower volumes and still getting nice body from my speakers. Pushes my JL 6.5 coaxial speakers very nice. My only complaint of the unit is that it does not have a dedicated gain control but it is a compact amplifier at a steal of a price so you can't ask it to move mountains.

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Sony XMS400D

I'm using this app to drive 4-in JBL studios very nice for that speaker great clarity no distortion nice that it's out of the way and hidden

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To say I'm "Pleased" would be a terrible understatement

Installed this little amp in the dash of my 2016 Honda FIT. Used the speaker level inputs (as my stock head unit doesn't have RCA's). I planned to replace only the amp first, then the speakers. After doing the amp alone, I can honestly say I'm blown away! The stock setup was very weak, sounded similar to a bedside clock radio. Now I have decent bass, and clear mids and highs (on my stock speakers!). I installed this in my dash (above the glove box) as I don't care for running wires all over my car. The amp runs cool and is completely out of sight.

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terrible amp & false advertising

Absolutely garbage. Don't waste your time trying to wire this. Compact amplifier right? Making connections supeerrrr simple right? LOL that's a bunch of you know what. This amp will cause damage to your speakers & blow fuse after fuse. Save yourself a headache and just don't buy it. Go with a normal amplifier! Where you can actually control the settings & wire it in a quarters time then this bologna. "It's easy set up" call support "you have to redo all your wiring" HAHA no thanks. Never so excited to return a product to a company. Keep this junk to collect dust in Crutchfield's or Sony inventory where it belongs.

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Nice add on, ease in wiring

Added amp this to my JVC head unit. Fit behind my dash like a charm, and powered my Polk DB 6.5" speakers very well! powered it right from my OEM harness, no need to run separate power for it.

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Sony XMS400D

Tucked up under dash Excellent product

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Great mini amp

This is a reasonably priced mini amp that's doing a great job powering my Rockford Fosgate door speakers. Clean, crisp sound and fits in a small space. Great addition to a factory stereo!

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Sony XMS400D

Super small and compact. I was able to install under center console of 2018 Accord lx.

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Perfect match for my system thanks to helpful guidance

My new speakers went from good to great! The support rep helped me to find the right amp for my setup and even saved me money. The gear arrived within 2 days and even a novice like me was able to follow the instructions Crutchfield provided. Customer for life!

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Good for the job

In conjunction with the Rockford Fosgate DSR1 properly configured for my 2018 Toyota Tundra with Rockford 6 3/4 components in the doors, Ken wood mids in the dash it sounds amazing. Clear sound, no clicks when keying on the vehicle. Perfect for setting up an amp in the dash behind a stereo to power full range speakers.

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Sony XMS400D

Very good amp, added more clarity to vocals and increased instrument separation. New to car audio, but I am pleased with my purchase. I was able to mount it behind my dash.

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Nice

Really good sound from small amp

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Sony XMS400D

Easy to setup. Sounds better than I expected on my 2018 Tacoma. So small I put mine in the glove box.

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Amp in the dash!

I was able to fit this just below the Sony AX-1000 on the adapter brackets easily. I now have my amp, radio, and XM receiver in the dash with the radio. Most convenient installation ever! Love the extra power, the amp and stereo really brought my speakers to life. Even my wife noticed the difference! This may be small, but it packs a punch just the same. I now have decent bass, crisp highs and plenty of volume.

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Compact and powerful. Fits ANYWHERE

While re-doing the audio system in my 1996 Toyota LandCruiser, a friend suggested this little amp to replace the ancient behemoth that was sitting in the right rear quarter panel of the truck. I ripped out the relic of the 90's and about 40 feet of wiring and swapped it out for this compact little gem. I was able to splice the Sony harness into my factory amplifier harness and tuck the XMS400d up under my dashboard in between the heater box and metal dash frame. The sound quality is top notch, install was simple, and space savings is monumental. I recommend it to anyone that will listen.

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Great value

A lot of power in something so small. Night and day difference in my factory head unit. And it's behind the dash! Easy install for a novice.

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2014 Honda CRV LX audio upgrade

This amplifier and the replacement of my 4 in-door factory speakers with Infinity 6532's made a significant difference in the clarity and punch of my car's audio. I have the CRV LX so no factory sub. It's not window rattling subwoofer bass of course, but crisp bass with no distortion (the factory setup had muddy sounding bass). Mids and highs are excellent. The amp lays nicely down in the driver side console pocket, out of sight but easily accessible. I removed the console (googled directions) and used a 1" hole saw to make a hole in the front upper corner of the pocket for the wiring harnesses to slip into from behind the console down from the factory head unit. Ran a #12 wire w/15A fuse from the battery thru the existing firewall grommet (poked hole with coat hanger and wire bullet taped on) for power. Factory unit was only 10A circuit so couldn't tap into that. There are several handy places in the console area behind kick plate to attach the ground. Wiring harnesses supplied were plenty long. Speaker wire colors did not match so had to research. Pulled factory radio and cut existing speaker wires to splice in the amp wiring, soldered all connections and used 1/8" shrink tube. Crutchfield tech was helpful to verify correct matching of Honda wire colors with Sony wire colors. Very happy with final result. Significant upgrade for about $400.

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No crossover

No crossover adjustment Just a glorified booster amp

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Sony XMS400D

No adjustment on it for max power

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Very easy install

Super small was able to fit behind the receiver and mount with no problem.

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Sony xms400d

This little amp really makes a big difference in my car system .I got it on the 4 channel mode with my pioneer head unit and 4 cerwin Vagas speakers and its pumping.really

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Mini amp

Great amp not much powerful then aftermarket head unit no options to bridge are run on 2ohms

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Freightliner Cascadia

Powerful amp for the size got hooked to the Sony xa100 and four morels speaker From phenomenal sound for just 45 W to channel it is mine blowing

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