Ashdown Engineering UK-RBM-800 Rootmaster 800 Watt Bass Head
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Description
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.
Specifications
Intrument Level: Impedance - 3.9M Ohms. Input Range 150mW to 20v p-p, Impedance - 10k Ohms. Input range 300mW to 40v p-pEffects 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
Q & A
Reviews
Protect your investment with the Long & McQuade Performance Warranty
A warranty can be a very important factor when making a buying decision. Because repairs can be very expensive in terms of parts and labour costs, manufacturers usually only provide one year limited warranties that generally only cover items that malfunction due to a manufacturer’s defect. With an important purchase such as a musical
instrument or piece of studio gear, however, many people want to have the peace of mind in knowing that their investment will be protected should the product no longer be performing at 100%.
Because of this, Long & McQuade provides our customers with a FREE one-year Performance Warranty on most of our products. The Long & McQuade Performance Warranty supplements the manufacturer’s warranty to ensure that our customers receive complete “no hassle” warranty coverage within their first year.
How does the Long & McQuade Performance Warranty differ from most manufacturers' warranties?
- Performance Guarantee: Normal wear and tear is covered, so your product will be performing as well as the day you purchased it for the entire duration of the coverage. Band and Orchestral Performance Warranty does not include replacing pads or cleaning for woodwind instruments, unless deemed necessary by our repair staff. Ultrasonic cleaning for brass instruments will be provided if deemed necessary by our repair staff, but is not routinely offered under the Performance Warranty.
- Product Replacement: If your product cannot be fixed or costs too much to fix, we will replace it with the equivalent model for no additional charge. If this is not possible, a full refund will be provided.
- No Lemon Policy: Your product will be replaced should the same problem occur multiple times.
- Convenient: Easy drop off and pick up of the product at any Long & McQuade location.
- Guitar Setup: Guitars purchased at Long & McQuade come with 1 free setup, to be redeemed within 1 year for new guitars and 90 days for used guitars.
- Loaners Available: A loaner product may be given while the product is being repaired.
- Power Surge Protection: Your product is covered even if damaged from a power surge.
- Accessory Coverage: Any peripheral devices or accessories that come with your product (i.e. foot pedal, case) are also covered.
- Commercial Use Coverage: Music and recording professionals who purchase gear for “heavy-use” commercial purposes will still be covered.
Long & McQuade reserves the right to restrict the purchase of additional years of Performance Warranty. Used products come with a 3-month Long & McQuade Performance Warranty. Some products (i.e. computers, software, cymbals and other items) are covered only by the manufacturer‘s warranty. Consumables (i.e. strings, reeds, drum sticks, batteries, tubes, cross faders) are excluded as they are designed to be replaced. Cosmetic Damage, Accidental Damage, or problems caused by Humidity or Temperature Issues are not covered. Speakers damaged by overpowering are generally not covered. Our coverage does not provide compensation for loss of use. As of June 2018 the Performance Warranty is no longer transferable. The warranty is only valid in Canada.
Purchasing additional years of coverage
Some manufacturers provide warranties for longer than 1 year; however, these are usually limited warranties that do not provide the same coverage as the Long & McQuade Performance Warranty. Customers interested in more complete and convenient (but not necessarily longer) coverage are still able to purchase additional years of the Performance Warranty.
If you are interested in receiving this coverage for longer than one year, you have the option of purchasing additional years of the Performance Warranty. The pricing is as follows:
- NEW products: Starting at 4% of the current new selling price to double the warranty from 1 year to 2 years. Starting at 4% for each additional year.
- USED products: Starting at 4% of the current new selling price to increase the warranty from 3 months to 1 year. Starting at 4% for each additional year.
- GUITARS: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year. $45 maximum. An additional free setup is not included with additional purchased years of Performance Warranty.
- BAND and ORCHESTRAL instruments: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year.
Reserve in Store
| Product | SKU | Qty |
|---|---|---|
| UK-RBM-800 Rootmaster 800 Watt Bass Head | 831264 |
