Developed with Pantera's Rex Brown, the RB-800 is an 800-watt UK-built bass head that blends Ashdown's signature tone with Rex's gritty edge. Featuring a versatile EQ section, Sub Harmonic Generator, Compression Control, and Valve Emulated Drive, it delivers everything from thunderous lows to snarling overdrive.

With an Analogue Cab Sim DI, modern connectivity, and a lightweight, road-ready build, the RB-800 is equally at home on stage or in the studio - built for bassists who demand power, precision, and attitude. The Rex Brown RB-800 is a signature bass amplifier designed to capture the unmistakable tone of one of metal's most iconic bassists. Featuring a comprehensive EQ system, Ashdown's Sub Harmonic Generator, one-knob compression, and a versatile Valve Emulated Drive, the RB-800 provides the tools Rex relies on to deliver his massive, cutting tone. From stadium-shaking lows to snarling overdriven growl, this amp puts his sound into your hands.

SPECIFICATIONS

Power Output: 800 Watts

Power Requirements: 115–230 Volts

Speaker Outputs: 2 × Neutrik Speakon/Jack outputs

High Instrument Input: Impedance 3.9MΩ, input range 150mV – 20 p-p

Low Instrument Input: Impedance 10kΩ, input range 300mV – 405V p-p

Line Input: Impedance 22kΩ, input level 0dBu nominal

DI Output: 420Ω balanced, Level 0dBu nominal

Effects Send: Impedance 22kΩ, Level 0dBu nominal

Effects Return: Impedance 22kΩ, input level 0dBu nominal

Frequency Response: –3dB @ 22Hz – 25kHz

Impedance: Minimum 4 Ohms

EQ

• Bass: ±15dB @ 100Hz
• Lo Mid: ±15dB @ 340Hz
• Middle: ±15dB @ 660Hz
• Hi Mid: ±15dB @ 1.6kHz
• Treble: ±15dB @ 7kHz shelving

Distortion: Less than 0.5% THD