The Ashdown UK-RBM-800 (Rootmaster Bass Magnifier) is the next evolution of the celebrated Rootmaster range now hand-built in the UK and designed to truly magnify the essence of your bass tone. Finished in a distinctive Ice Blue and housed in a lightweight, gig-ready chassis, this 800 watt head delivers the authority, articulation, and tonal richness that working bassists demand, without sacrificing portability.
At its core, the UK-RBM-800 features the complete suite of Ashdown's iconic tone-shaping tools. The Sub-Harmonic Generator lets you blend in a powerful octave below your fundamental notes, adding dimensions and weight that enhances everything from modern low-tuned grooves to classic vintage lines. The onboard Compressor smooths out peaks with a musical, natural feel, while the valve-emulated Overdrive circuit gives access to tones ranging from warm harmonic lift to full, textured growl perfect for shaping your sound across genres and playing styles.
The built-in FX loop allows easy integration with external pedals and processors, ensuring the amp sits comfortably at the heart of even the most complex signal chains. For firect applications, the UK-RBM-800 includes both a traditional DI output and an analogue Cab Sim DI that recreates the response of a perfectly mic'd Ashdown cabinet, offering reliable, plug-and-play tone for live engineers and recording setups.
A dedicated Headphone Out provides an authentic, isolated playing experience for late-night practice or home use. Combines with its rugged UK construction, upgraded components, and thoughtful design, the UK-RBM-800 stands as a powerful and versatile Rootmaster Bass Magnifier - built to elevate, enhance, and project your tone the signature Ashdown warmth and authority.
SpecificationsIntrument Level: Impedance - 3.9M Ohms. Input Range 150mW to 20v p-p, Impedance - 10k Ohms. Input range 300mW to 40v p-p
Effects Return: Impedance - 22k Ohms. Input level 0dBu nominal
Line Input: Impedance - 22k Ohms. Input range 300mV
Effects Send: Impedance - 22k Ohms. Level 0dBu nominal
D.I Output: 420 Ohms balanced. Pre ground lift level -20dBu nominal
Speaker Outputs: Minimum Impedance - 4 Ohms
Frequency Response: -3dB at 22Hz and 22kHz
Headphone Output: 3.5mm Jack output @ 32 Ohms
EQ: Bass, Lo Mid, Middle, Hi Mid, Treble
Signal to Noise: Better than 80dB (E.Q. Flat)
Distortion: Less than 0.5% Thd
Output Power: 803 watts into 4 Ohms (dependant on local Mains Supply)
Dimensions: 89 x 311 x 235
Weight: 3 kg
