British bass amp manufacturer Ashdown Engineering made a powerful statement at NAMM 2025 by launching two signature models, developed in collaboration with legendary bassists Rex Brown (Pantera) and Shavo Odadjian (System of a Down). These new amps, the RB-800 and SO-1200, take Ashdown’s hallmark tonal excellence to the next level, delivering the grit, power, and versatility that both artists demand.
“Walk” the Line Between Power and Precision With Rex Brown’s RB-800
A true powerhouse, the RB-800 is an 800-watt bass amplifier head crafted in the UK, embodying Rex Brown’s unmistakable sonic identity. Ashdown worked closely with Brown to ensure the amp captures his signature growl while offering modern features for live and studio applications.
Built with versatility in mind, the RB-800 boasts a comprehensive EQ system, a sub harmonic generator, and a valve emulated drive, making it capable of everything — from thick, vintage warmth to aggressive modern tones. Other notable features include 800w power output, analog cab sim DI output, compression control, and dual Neutrik speakon/jack outputs.
At just 2.5 kg, the RB-800 is an incredibly portable yet robust amp head, proving that massive tone doesn’t require massive gear. With a suggested price of £832.50, this amp offers a compelling blend of affordability and professional-grade performance.
“B.Y.O.B.”: “Bring Your Own Bass” Fury With Shavo Odadjian’s SO-1200
For those seeking sheer power and flexibility, Ashdown presents the SO-1200, a 1,200-watt monster co-designed with Shavo Odadjian. Known for his dynamic playing and earth-shaking low end, Odadjian’s new signature amp is a testament to his relentless pursuit of tonal perfection.
Designed for professional bassists, the SO-1200 features dual 600w power sections, 9-band EQ, and variable valve drive (12AX7 tube). It also offers a one-knob compressor and sub-harmonic generator for enhanced low-end response and controlled dynamics. The multiple speaker outputs (4 x jack/speakon) ensure adaptability to different rigs.
With its rugged UK-built construction and state-of-the-art connectivity, including DI output and an FX loop, the SO-1200 is a formidable option for bassists who demand uncompromising performance. Priced at £1,249.17, this amp is a serious investment for serious players.
The Future of Bass Amplification
NAMM 2025 has proven once again that Ashdown Engineering remains at the forefront of bass amplification. The RB-800 and SO-1200 not only reflect the unique styles of two legendary bassists but also push the boundaries of what modern bass amps can achieve. Whether it’s Brown’s raw, aggressive punch or Odadjian’s thunderous low-end presence, these signature amps solidify Ashdown’s commitment to innovation and sonic excellence.
For bass players looking to elevate their tone, these amplifiers are game-changers. Ashdown’s latest offerings set a new benchmark, ensuring that the unmistakable sound of rock and metal bass remains as powerful as ever.
Article written by Karen Batista,
Karen Batista is the Head of Content at Bass Review Magazine, shaping the publication’s voice with her expertise and passion for all things music. She curates in-depth reviews, artist features, and industry insights, ensuring every piece delivers real value to readers.
