BOSS Audio R2504 Riot Series 4-Channel Car Amplifier - Full Range

In this review the BOSS Audio R2504 Riot Series amplifier is assessed for buyers looking to add reliable power and basic tuning to a car system without a high price. Its single biggest selling point is straightforward power flexibility: it can deliver up to 250 watts max per channel at 2 ohms and be bridged for up to 500 watts to drive a sub or high-power speakers. The R2504 is best for first-time installers and budget builds who want a Class A/B, full range amp with simple controls and a remote subwoofer level option.

Key Features

• Power flexibility: 250 watts max x4 at 2 ohms and 500 watts bridged gives room to power both speakers and a bridged subwoofer in the same package.
• Class A/B topology: combines current capacity and efficiency to reproduce a wide range of music dynamics for improved real-world listening.
• Full range operation: allows the amp to run door speakers or subwoofers, so it can serve as a simple all-in-one upgrade for a small system.
• Adjustable tuning: variable gain, bass boost and high/low pass crossovers let installers tailor the amp to speaker sensitivity and source output.
• Remote sub control: included remote control for subwoofer level makes on-the-fly bass adjustment convenient from the cabin.
• Compact footprint: at roughly 10.72 x 10.44 x 2.25 in it fits in tight spaces under seats or behind panels.

Who It's For

The R2504 is aimed at budget-conscious car owners upgrading factory sound for better punch and flexibility; it is especially suitable for first-time installers who want clear channel options and bridgeability without complicated digital menus. Enthusiasts who want a compact, full range Class A/B amp with remote sub control will appreciate the straightforward controls and modest size.

Those seeking reference-level clarity, ultra-low noise floors, or guaranteed heavy-duty longevity should look at higher-end models instead; some users report intermittent noise and durability concerns, so systems where absolute reliability or studio-grade silence is required may need a more robust amplifier.

Pros & Cons

Pros

• Good value for money with flexible channel wiring and bridge mode for added power.
• Useful set of analog controls including variable gain, bass boost and high/low pass crossovers.
• Compact dimensions make installation in constrained spaces easier.
• Remote subwoofer level control adds convenience for cabin tuning.

Cons

• Sound quality reports are mixed and some buyers experience audible noise or whining in certain systems.
• There are occasional durability and channel reliability complaints, so professional installation and careful wiring are advisable.

Specifications

Our Verdict

The BOSS Audio R2504 is a practical, budget-friendly four-channel Class A/B amplifier that delivers flexible wiring and usable power for casual listeners and first-time installers. It offers solid tuning options and a compact size that make it a sensible upgrade for factory systems, but buyers who need pristine noise performance or rock-solid long-term durability should consider stepping up to a higher-tier amp.

Frequently Asked Questions

Can this amp run speakers and a sub at the same time?
Yes. It is a full range 4-channel amp with crossovers and a bridged mode to dedicate channels to a subwoofer while powering speakers.

Is the amplifier difficult to install?
Installation is straightforward for someone with basic car audio experience, and professional installation is recommended to avoid wiring noise and ensure reliable grounding.

Does it include protection fuses?
Yes. The unit uses two 25 amp ATO blade fuses as part of its protection scheme.