---
product_id: 2551749
title: "R4002"
brand: "boss audio systems"
price: "€ 219.58"
currency: EUR
in_stock: null
reviews_count: 13
category: "Boss Audio Systems"
url: https://www.desertcart.gr/products/2551749-r4002
store_origin: GR
region: Greece
---

# 800W max bridged power Class A/B full range amp Variable input gain control R4002

**Brand:** boss audio systems
**Price:** € 219.58
**Availability:** ❌ Out of Stock

## Summary

> 🎵 Unleash your ride’s true sound potential — don’t just listen, dominate the road!

## Quick Answers

- **What is this?** R4002 by boss audio systems
- **How much does it cost?** € 219.58 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/2551749-r4002)

## Best For

- boss audio systems enthusiasts

## Why This Product

- Trusted boss audio systems brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** MOSFET power supply ensures efficient, reliable performance even in demanding environments.
- • **Compact Yet Mighty:** Slim 10.7” x 10.4” x 2.25” design fits discreetly under seats without sacrificing power.
- • **Precision Sound Control:** Variable input gain and high/low pass crossovers let you tailor your audio experience perfectly.
- • **Power that Packs a Punch:** Delivers up to 800 Watts max bridged output for booming bass and crystal-clear highs.
- • **Plug & Play with Pro-Level Flexibility:** Supports 2/4 Ohm speakers, bridgeable channels, and includes remote subwoofer control for ultimate convenience.

## Overview

The BOSS Audio Systems R4002 Riot Series is a compact, high-output 2-channel Class A/B amplifier delivering up to 800 Watts max power bridged at 4 Ohms. Featuring MOSFET power supply technology, variable gain control, and full-range capability with high/low pass crossovers, it offers professional-grade sound customization. Designed for easy installation and durability, it includes a remote subwoofer control and supports 2 to 8 Ohm speakers, making it the perfect upgrade for millennial drivers seeking powerful, clear, and customizable in-car audio.

## Description

Drive your in-vehicle audio experience up a level with the Boss Audio Riot R4002 Class A/B 2-Channel Full Range Amplifier. This 2-Ohm stable amplifier features 800 Watts Max Power with a MOSFET power supply to pump out your playlists. Customize the sound with Fixed High Pass Crossover, Variable Low Pass Crossover and Bass Boost. Control those Bass vibes with the Remote Subwoofer Control. Bridge channels for more power and flexibility. Amplifiers in the Riot Series are perfect for first time car audio buyers looking to add Bass, enhanced sound and performance to their system at an affordable price. Get your vehicle rocking with the Boss Audio R4002. For further product details, please scroll down.

Review: IT’S NOT THE AMP’S FAULT! - ***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!!!
Review: Power and sound quality in the car - This amplifier exceeded my expectations. The installation was simple and the difference in the car's audio is impressive: the bass is heard deeper, the treble is clearer and in general the sound is much stronger. It does not distort even if it increases the volume and you can see the quality in every detail. In addition, the size is compact and does not take up too much space. Without a doubt, an excellent purchase for those who enjoy good music in the car.

## Features

- Power - 400 Max x 2 @ 2 Ohms, 200 Max x 2 @ 4 Ohms, 800 Max Bridged x 1 @ 4 Ohms
- Full Range - With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers
- Low & High Level Inputs - A low level (RCA) input is measured in voltages. A high level (+/- wire) input is measured in wattages. Both essentially carry signal from your receiver to your amplifier to your speakers
- Variable Input Gain Control - The gain control is not for adjusting volume. It simply adjusts the amount of signal that is coming from your receiver and going to your amplifier
- 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
- 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: 10.72” x 10.44” x 2.25”, Weight: 5.20 lbs., Speaker Impedance: 2 to 8 Ohm, THD @ RMS Output: 0.01%, S/N Ratio: 102 dB, Frequency Response: 9 Hz to 50 kHz, Fuse Quantity: 1 40 Amp ATO Blade
- Warranty - BOSS Audio Systems provides a 6 Year Platinum Online Dealer Warranty for purchases through desertcart.Com. We strongly encourage professional installation of this product to ensure proper functionality

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004S50ZNA |
| Best Sellers Rank | #22,501 in Electronics ( See Top 100 in Electronics ) #26 in Car Dual-Channel Amplifiers |
| Brand | BOSS Audio Systems |
| Color | Black |
| Customer Reviews | 4.0 4.0 out of 5 stars (5,440) |
| Date First Available | March 15, 2011 |
| Department | BOSS AUIO |
| Global Trade Identification Number | 00791489115292 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.2 pounds |
| Item dimensions L x W x H | 10.72 x 10.44 x 2.25 inches |
| Item model number | R4002 |
| Manufacturer | BOSS Audio Systems |
| Material | Metal and Plastic |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Other display features | Wireless |
| Output Power | 800 Watts |
| Package Type Name | MOSFET Car Amplifier |
| Product Dimensions | 10.72 x 10.44 x 2.25 inches |
| Specification Met | certified frustration-free |
| UPC | 151903166987 791489115292 |
| Whats in the box | Remote subwoofer control |

## Product Details

- **Brand:** BOSS Audio Systems
- **Item dimensions L x W x H:** 10.72 x 10.44 x 2.25 inches
- **Manufacturer:** BOSS Audio Systems
- **Mounting Type:** Surface Mount
- **Number of Channels:** 2

## Images

![R4002 - Image 1](https://m.media-amazon.com/images/I/91arWIXGJWL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ IT’S NOT THE AMP’S FAULT!
*by J***N on July 2, 2018*

***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!!!

### ⭐⭐⭐⭐⭐ Power and sound quality in the car
*by R***O on September 10, 2025*

This amplifier exceeded my expectations. The installation was simple and the difference in the car's audio is impressive: the bass is heard deeper, the treble is clearer and in general the sound is much stronger. It does not distort even if it increases the volume and you can see the quality in every detail. In addition, the size is compact and does not take up too much space. Without a doubt, an excellent purchase for those who enjoy good music in the car.

### ⭐⭐⭐⭐ Small loud amp
*by C***Z on January 13, 2026*

Excellent replacement for OEM system. Small powerful amp. Only setback is that has no crossover, full range only with volume (in voltage) control.

## Frequently Bought Together

- BOSS Audio Systems R4002 Riot Series Car Audio Stereo Amplifier – 800 High Output, 2 Channel, Class A/B, 2/4 Ohm, Low/High Level Inputs, High/Low Pass Crossover, Full Range, Bridgeable, Subwoofer
- BOSS Audio Systems KIT2 8 Gauge Complete Car Amplifier Installation Wiring Kit with Power Cables, Ground Cables, Turn-On Wire, Speaker Wire, Terminals

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**Shop now:** [https://www.desertcart.gr/products/2551749-r4002](https://www.desertcart.gr/products/2551749-r4002)

---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-23*