BOSS Audio Systems R1004 Riot 400 Watt 4 Channel Class A/B Car Amplifier
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Availability:
In Stock.
Arrives
Nov 4 – Nov 8
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Style: 400W 4 Channel
Features
- Power - 100 Max x 4 @2 Ohms, 50 Max x 4 @4 Ohms
- Class A/B Topology - Class A amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class B amplifiers have no current flowing through its outputs with no audio signal
- Full Range - You have the option to run your speakers at full range, plus a subwoofer for some bass. Make sure the math adds up and you are good to go. i.e. Impedance loads, proper polarity.
- MOSFET Power Supply - A MOSFET is an electrical switch that allows the flow of electrical current. It controls the output voltage & current precisely by removing the output current sensing loss & eliminating all secondary feedback circuitry.
- Specs - Dimensions: 7.75 x 9 x 2, Weight: 3.09 lbs., Speaker Impedance: 2 to 8 Ohm, THD @ RMS Output: 0.01%, S/N Ratio: 90 dB, Frequency Response: 12 Hz to 22 kHz, Fuse Quantity: 1 15 Amp ATO Blade.
- 6 Years Parts and Labor
Description
Power up your music on the trails with the Boss Audio Riot R1004 4 Channel Class A/B Amplifier. This 2-Ohm stable Amplifier features 400 Watts Max Power with a MOSFET power supply to get your music in gear. Amplifiers in the Riot Series are perfect for first time car audio buyers looking for enhanced sound and performance for their system at an affordable price. Get better sound with the Boss Audio R1004. For further product details, please scroll down.
Manufacturer: BOSS Audio Systems
Brand: BOSS Audio Systems
Number of Items: 1
Built-In Media: Users manual
Item Type Name: BOSS Audio Systems R1004 4 Channel Car Amplifier – Riot Series, 400 Watts, Full Range, Class A/B, 2 Ohm Stable, IC (Integrated Circuit) Great for Car Speakers and Car Stereos
Item Weight: 3.1 pounds
Model Number: R1004
Mfr Part Number: R1004
Unit Count: 6 Count
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 4 – Nov 8
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: 400W 4 Channel
***UPDATE 8/4/18*** I went mudding a week ago and accidentally sank my jeep in a pond 🙃 Completely flooded the floor of my interior and soaked the amp, luckily it was off. A couple days later I ripped the entire interior out and washed it out really good, like literally washed the inside of my jeep with a hose. I figured the amp had already been soaked what more harm could I do. Got everything back together after drying out, fired up the jeep, turned the stereo on and BAM! Perfect sound quality. If it can get soaked twice and still work I think that says something. *end of update* Did you know, that running your power lead in close proximity to your audio cables can cause loss of sound clarity, distortion, and you guessed it, alternator whine?! I’ve had to fix plenty of botched installs due to this. I did a little test and ran my audio cables directly next to my 4g power lead going to both my amps. Heavy whine and almost no signal clarity. Re routed my cables to run on the opposite side of my power lead and wow! Signal was clear, bassy, and no alternator whine. This amp is phenomenal and woke up the old Bose speakers I pulled out of a 2001 Pontiac GTP (2ohms at 50 watts RMS, give or take). I drive a Jeep Wrangler TJ and space is precious, so I can’t have big amps and fancy subs. This fit under my driver seat perfectly and cranks some serious audio to my speakers, even with the top down. Great price for a quality low budget system and I get lots of compliments from friends. GREAT AMP!!!
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Reviewed in the United States on July 2, 2018 Reviewed in the United States on July 2, 2018 by Jamison
Style: 400W 4 Channel
Excelente
Reviewed in the United States on June 16, 2026 by Franklin Romero
Style: 400W 4 Channel
Piece of junk. Dont believe me then go ahead and get it. Waste your money. Amazon should not be affiliated with this junk. Edit: So if anyone comes accross this and wonders, then I'll go more into detail about why it is junk. 1. The amp amplifies any electrical noise inside your vehicle on top of the never ending beeping sound it already makes. (Read the other reviews about this. It's way too common to ignore.) 2. The amp does not put out clean sound at all. (I used this for my door speakers.) I know this is not clean sound even when comparing this amp my also budget 2 channel "Do" amp it sucks. It can make your speakers sound blown. The amp throws random frequencies to your speakers whenever it wants because it has a built in non-adjustable crossover. It's not always giving you example: 10hz-20khz the full time if you want it.. Based off what I know. If the amp you are wanting to get has an adjustable hpf and lpf then it will most likely give you the sound you need. Make sure to read reviews to see if people are having grounding issues with the amplifier causing it to make harsh noises. Still on the budget side of things you get what you pay for. Just don't agree with boss ripping people off with this amplifier. Do your research. I hope this review helped you learn from my own mistake. FACE PALM.
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Reviewed in the United States on January 9, 2019 by Jacob prosser
Style: 400W 4 Channel
This unit is clearly not intended to push anything more than a few door speakers. So many people having issues with the amp, and it appears that many of them are using it incorrectly. This is not meant to be bridged and used to power a subwoofer. It is intended to be used to give your door speakers a little boost over the stock amp in your head unit. I also read a lot of reviews about there being a lot of engine noise. I had this issue as well. A couple of things usually cause this issue: 1) A bad ground, causing the head unit to send a bad signal to the amp (tested this by hooking up my phone directly to the amp, and getting no interference) - can also occur if the head unit is cheap, a.k.a "Dual". 2) Gain set too high I fixed these issues by setting my gain just low enough that I couldn't hear any more engine whine, and by installing an in-line ground loop isolator. After that, it was all about setting up my head unit to put out as much sound as I could get it to. Once I got everything set up, and replaced my cheapo Dual head unit with a Pioneer, I was able to tune the sound to get the amp to push my door speakers as loud as it could. To avoid distortion, I used the crossover setting in my head unit to take out all the bass from the door speakers. I have two 12s in the back that easily fill this lack of bass in, giving me a really good and loud sounding setup. I couldn't be happier, so long as the amp lasts. Don't expect this thing to be the best amp you'll ever buy. It isn't. But, for the price, it's a fantastic option to get more out of your aftermarket door speakers.
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Reviewed in the United States on May 15, 2018 Reviewed in the United States on May 15, 2018 by Devon Day
Style: 400W 4 Channel
Most boss products are either a hit or a miss, and I gotta say this is one of their hits! For the price, this amp sounds great. Would definitely recommend for anyone looking for a cheap, good amp.
Reviewed in the United States on November 15, 2025 by Jaden Gilray
Style: 400W 4 Channel
This product does work.. and I guess if you dont mind being lied to it's a way to get the ball rolling on having no sound in your car until you can upgrade. But man its gonna be so nice when you finally get out of the minor minor leagues. So to each his own it only barely gives 2/3 of what it says I does. Peace
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Reviewed in the United States on June 13, 2026 by Darilyn B.
Style: 400W 4 Channel
Excelente 👌 trabajo estoy satisfecho 😏
Reviewed in the United States on May 28, 2026 by Orlin palma
Style: 400W 4 Channel
Works as described. I bought the wrong item tho so Im returning.
Reviewed in the United States on May 10, 2026 by Shaleece