BOSS Audio R4002 Riot Series 2-Channel Amplifier - 800W Peak

In this review of the BOSS Audio R4002 Riot Series amplifier the bottom line is simple: this is an affordable, full range Class A/B amp aimed at first-time car audio upgraders who want clear extra power without a complex install. The R4002 delivers up to 800 watts bridged and offers both low and high level inputs plus a MOSFET power supply, so it can drive door speakers or a small subwoofer while keeping a compact footprint. It is best chosen for shoppers prioritizing value and basic flexibility rather than audiophile perfection.

Key Features

• 800W bridged output: Allows a single bridged channel at 800 watts max to push a subwoofer or a demanding speaker for louder, fuller bass.
• Dual-channel full range: Lets buyers run speakers and subs from the same amp, offering flexibility for simple system builds.
• MOSFET power supply: Provides stable voltage and current control for cleaner power delivery and improved reliability over basic supplies.
• Low and high level inputs: Accepts RCA preamp signals or speaker-level connections so it integrates with both aftermarket and factory receivers.
• Adjustable crossovers and gain: Includes fixed high pass, variable low pass and gain control so installers can tune bass and speaker output to site conditions.
• Compact size: At roughly 10.72 x 10.44 x 2.25 in it fits behind seats or under panels where space is tight.

Who It's For

The R4002 is ideal for first-time car audio buyers or anyone adding bass or upgraded door speakers on a modest budget; it gives clear incremental power and useful controls without elaborate setup. Installers who need a compact, bridgeable amp with both RCA and speaker-level inputs will appreciate the flexibility for mixed-signal systems.

Those seeking pristine, studio-grade sound or extreme long-term durability may want to look at higher-end class D or premium class A/B models, since some users report mixed sound quality and occasional noise issues under specific installs. For casual listeners and budget builds, this amp is a practical choice.

Pros & Cons

Pros

• Good value for money with useful features like MOSFET supply and bridgeable output.
• Flexible inputs and crossover options make it easy to integrate with most head units.
• Compact dimensions and a single 40A fuse simplify installation in tight spaces.

Cons

• Some customers report mixed sound quality and occasional noise or channel issues, so long-term durability may vary.

Specifications

Power (2 Ohm)	400 Watt max x 2
Power (4 Ohm)	200 Watt max x 2
Bridged Power	800 Watt max x 1 @ 4 Ohm
Frequency Response	9 Hz to 50 kHz
Signal to Noise Ratio	102 dB
Dimensions	10.72 x 10.44 x 2.25 in
Fuse	1 x 40 Amp ATO blade

Our Verdict

The BOSS Audio R4002 Riot Series is a practical, budget-friendly amplifier for people who want added power and flexible inputs without a complex system overhaul. It offers strong bridged output and useful tuning controls, making it a good value for casual listeners and first-time installers who accept occasional compromises in refined sound or long-term robustness.

Frequently Asked Questions

Can this amp run both speakers and a subwoofer?
Yes. It is a full range 2-channel amp with crossover controls and can run door speakers or bridge to power a subwoofer.

Does it accept factory head unit connections?
Yes. The amp includes both low level RCA inputs and high level speaker inputs for factory or aftermarket head units.

Is professional installation recommended?
Yes. The manufacturer recommends professional installation to ensure proper wiring, grounding and optimal function.