Ashdown - Bass Amplifiers
Ashdown RM 420 Head
420-watt bass head with 5-band EQ and sub-harmonic generator
Free UK delivery by 23 - 25 Jul
THERE IS ONLY ONE.
ABOUT THIS PRODUCT
Ashdown RM 420 Head - Bass Amplifier - Fair
Why This One
- Fair condition - a fully working unit at a great price
- Fully tested - all applicable functions verified working
- 420-watt solid-state head with 5-band EQ and onboard sub-harmonic generator.
- Discontinued model - second-hand is now the only way to get one.
Condition: Fair
This Ashdown RM 420 Head is a fair-condition bass amplifier. It has passed our 10-point functional test, with 4 item(s) not applicable to this unit. Note: The VU meter does not respond to input signal. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.
What's Included
- Ashdown RM 420 Head
- No additional accessories included
About This Model
The Ashdown Rootmaster RM 420 is a solid-state bass amplifier head delivering 420 watts of power in a compact, lightweight enclosure weighing just 4 kg. Its feature set is built around a 5-band rotary EQ - covering Bass (100Hz), Lo Mid (220Hz), Middle (660Hz), Hi Mid (1.6kHz), and Treble (7kHz) - each with ±15dB of adjustment, alongside a Deep boost and a one-touch Shape switch for instant classic Ashdown tones. On-board processing includes a one-knob compressor, a footswitchable tube-emulated overdrive, and a footswitchable sub-harmonic generator for added low-end depth. Connectivity covers high- and low-impedance instrument inputs, a line input for backing tracks, balanced DI output, tuner output, effects loop, and two speaker outputs accepting a minimum 4-ohm load. The RM 420 is a discontinued model, making used examples the primary route to ownership.
A great opportunity to own a Ashdown RM 420 Head at this price point.
General
| Brand | Ashdown |
| Model | Ashdown RM 420 Head - Bass Amplifier - Fair |
| Category | Bass Amplifiers |
| Condition | Fair |
Condition
This Ashdown RM 420 Head - Bass Amplifier - Fair has been inspected and set up by our workshop. Every item is a single, one-off piece, photographed as it is so you know exactly what you are buying.
Condition guideOur inspection process
- 01
Workshop inspection
Checked by a specialist, not just a technician. Body, hardware and cosmetics visually assessed for wear, damage and authenticity.
- 02
Function tested
Controls, connections and electronics tested at the bench to confirm everything works as it should.
- 03
Prepared for use
Cleaned and set up where needed so it arrives ready to use straight out of the box.
- 04
Photographed & documented
Every angle, mark and detail captured in high resolution so you know exactly what you are buying.
- 05
Double-boxed dispatch
Re-checked before packing, then carefully packed and sent tracked and signed-for.

"Buying was very quick and easy, delivery was confirmed a few hours later and was fully tracked and on time. Highly recommended!"
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After you buy
01
Order placed
Payment confirmed instantly. You'll get an email receipt and tracking link to follow.
02
Workshop pack
We re-check the inspection, photograph the packing, and carefully box for safe transit.
03
Tracked dispatch
Signed-for courier across the UK. Most orders arrive within 2 working days.
04
30-day returns
Not the one for you? Send it back within 30 days for a full refund.
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Ashdown RM 420 Head - Bass Amplifier - Fair










