High Power Output: Delivers up to 1800W total (depending on impedance) to drive your audio system to new heights.
Class D Efficiency: Ensures powerful performance with minimal heat generation, maximizing efficiency.
RGB LED Lights: Customizable LED lighting to enhance the aesthetics of your car audio setup.
4-Channel Configuration: Perfect for powering multiple speakers or subwoofers for a balanced, high-performance sound.
Adjustable Bass Boost: Fine-tune your bass to match your preferences with 0-12 dB of bass boost.
Signal & Noise Performance: High signal-to-noise ratio ensures clean, clear sound.
Durable & Compact Design: Built to last and designed to fit comfortably in tight spaces.
Versatile Crossovers: Equipped with low-pass and Hi-Pass crossovers for precise sound control.

B2 Audio 1800W 2-Ohm Class D Half Bridge 4ch Amp w/ RGB LED Lights RIOT Series

This Listing Includes:

(1) B2 Audio RIOT Series 1800 Watt 4-Channel Amplifier with RGB LED Lights

The B2 Audio RIOT Series 4-Channel Amplifier is engineered for efficient power delivery, system flexibility, and long-term reliability in a compact chassis. Built on a half-bridge Class D topology, this amplifier delivers strong, consistent output while minimizing heat buildup and electrical strain—making it well suited for daily-driven systems and space-conscious installs.

With flexible channel configurations, the RIOT 1800 can be used to power mids and highs, run active front stages, or bridge channels for higher-output applications. Integrated RGB LED lighting adds a clean visual upgrade with selectable sound-activated patterns or the option to disable lighting entirely for a stealth install.

For optimal performance and stability, upgrading your vehicle’s electrical system is recommended, especially when operating the amplifier at lower impedances or higher output levels.

Why a Half-Bridge Class D Design?

This amplifier uses a half-bridge Class D architecture, chosen for its balance of efficiency, durability, and real-world electrical compatibility.

Benefits of a half-bridge design include:

Reduced heat generation, allowing the amplifier to run cooler under load

Lower component stress, improving long-term reliability

Efficient power usage, making better use of available system voltage

Stable operation with stock or mildly upgraded electrical systems

The result is a 4-channel amplifier that delivers clean, controlled power while maintaining dependable performance in everyday applications.

Key Features

Powerful multi-channel performance: 4 x 300W RMS at 4 ohms, 4 x 450W RMS at 2 ohms, or 2 x 900W RMS bridged at 4 ohms

High-efficiency Class D circuitry for consistent output and reduced heat buildup

Full crossover control with adjustable low-pass and high-pass filters (50 Hz to 5 KHz, 12 dB/oct)

Integrated RGB LED illumination with multiple sound-activated lighting modes

Smart protection system with power, protection, and clip indicators for safe operation

Compact design for easier installation, measuring 13.82 x 4.92 x 2.24 inches

1-gauge power terminal with a 150A fuse rating for stable connections

Specifications

Continuous Output Power (RMS) @ 4 Ohm: 4 x 300W

Continuous Output Power (RMS) @ 2 Ohm: 4 x 450W

Continuous Output Power (RMS) @ 4 Ohm Bridged: 2 x 900W

Circuit Configuration: HI-EF Class D

Frequency Response: 10 Hz to 40 KHz (-3 dB)

Signal to Noise Ratio: greater than 90 dB

Input Sensitivity: 6 V to 0.4 V (RCA)

High Level Input: 10 V to 0.8 V

Crossover Circuit: 12 dB/oct

Low Pass Crossover: 50 Hz to 5 KHz

High Pass Crossover: 50 Hz to 5 KHz

Power Terminal Gauge: 1 Gauge

Operational Voltage: 10 V to 16 V

Fuse Rating: 150 A

Dimensions:

Length: 13.82"

Width: 4.92"

Height: 2.24"

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B2 Audio 1800W 2-Ohm Class D Half Bridge 4ch Amp w/ RGB LED Lights RIOT Series