Ashdown Engineering


£575.00 £775.00
We have an exclusive number of these heads available. Used for demo and photography purposes, LIKE NEW, no original packaging.
Elevate your stage presence with the Ashdown RM-800 EVO II, the ultimate solution for musicians seeking massive headroom without the back-breaking weight. Weighing in at a mere 2.6kg (5.5lbs), this powerhouse delivers a remarkable 800 watts of power while maintaining class-leading quality and a rich feature set.
The Rootmaster EVO II range now includes an onboard headphone preamp, perfect for silent practice sessions. It accommodates both passive and active input instruments, ensuring a crystal-clear signal path to the input control, which can be finely tuned using the iconic Ashdown VU meter. With your signal optimized, you can explore the rich tonal possibilities with features like the shape button, 5-band EQ, onboard compressor, and valve-emulated overdrive.
The amp's drive control adds a delightful touch of valve-driven overdrive to your sound, and the sub-harmonic controls offer added depth and richness – both foot-switchable with an FS-2 foot-switch (sold separately).
Designed with gigging musicians in mind, the Rootmaster 800 EVO II Head boasts a clear anodized alloy housing, a sleek black anodized front panel, and remarkable portability for musicians who crave colossal headroom.

Please Note:

Direct purchases NOT available in the United States

Find your local dealer HERE

Bass The World Review

Gregor and Lars take you through the features and sounds of the Rootmaster 500 EVO II head.


  • Power Output - 800 Watts
  • Power Requirements - 115-230 Volts
  • Speaker Outputs - 2 x Neutrik Speakon/Jack outputs
  • Frequency Response - -3dB @ 17Hz und 30KHz
  • High Instrument Input - Impedance 3.9m Ohms, input range 150mV
  • Low Instrument Input - Impedance 10k Ohms, input range 300mV - 405V p-p
  • Line Input - Impedance 22k Ohms, input level 0dBu nominal
  • DI Output - 600 Ohm balanced, Level 0dBu nominal

  • Tuner Output - Impedance 22k Ohms, Level 0dBu nominal
  • Impedance - Minimum 4 Ohms
  • Signal to noise- Better than 80dB (EQ flat)
  • EQ - Bass +/-15dB @ 100Hz, Lo Mid +/-15dB @ 220Hz, Middle +/-15dB @ 660Hz, Hi Mid +/-15dB @ 1.6kHz, Treble +/-15dB @ 7kHz shelving Deep +
  • Effects Send - Impedance 22k Ohm, Level 0dBu nominal
  • Effects Return - Impedance 22k Ohms, Input Level 0dBu Nominal
  • Distortion - Less than 0.5% THD
  • H x W x D (mm) - 89 x 311 x 235
  • Weight (kg) - 2.5

Ashdown rm800 evo ii head front panel with matt black anodised alloy finish
Matt Black anodised alloy front panel
Ashdown have upgraded the amp’s front panel with a matt black anodised alloy finish, replacing the previous polished stainless steel. This simple, yet observant modification makes reading your amp settings at a glance that bit easier when placed under bright stage lighting.

No more reflective surfaces.
Ashdown rm 800 evo ii head eq controls
Simple, powerful EQ
The Rootmaster EVO series’ pre amp now includes a passive and active input jack socket for use with high and low output instruments. The five- band rotary tone controls act with surgical precision to provide total control over your sound, while a shape switch instantly dials you in to a classic Ashdown tone setting, straight from the world-famous ABM.
Ashdown rm 800 evo ii head one know compressor
One-knob Compression
Instantly adding warmth and body to your tone, this simple to use, great sounding compressor delivers a powerful, even sound to make sure your bass is smooth as silk and will fill out any mix.
Ashdown rm 800 evo ii head over drive and sub controls
Overdrive & Sub
With footswitchable flexibility, our tube-emulated overdrive can take your core bass sound and push it into warm overdrive through to distorted filth whenever you need to add extra grind and girth to your tone.

Bringing extra depth and definition to your bass parts, the Sub-Harmonic Generator lets you dial in a sub-octave and kick it in via footswitch whenever you need the extra depth for those super-heavy Godzilla moments.
Ashdown rm800 evo ii head di output and Neutrik Jack and speakon sockets
Totally connected
If you want to use your favourite pedals or multi-effects, you’ll find send and return sockets on the back panel, along with a DI output for direct injection into the PA mixer or recording console and a Line Input (with front panel level control) so you can jam along with a backing track in rehearsal.

A pair of Neutrik Jack/Speakon sockets with a minimum 4 ohm load provides flexible partnering options with a dedicated range of Rootmaster EVO cabinets. The Rootmaster 800 EVO II can be used to power a single 8 ohm cabinet, a pair of 8 ohm cabinets or a single 4 ohm cabinet.
Ashdown rm 800 evo ii head headphone output
Headphone Output
The Rootmaster EVO II range now comes equipped with an on-board headphone preamp to allow for silent practice,which doubles up these gig-ready amplifiers as handy practice devices. The headphone preamp maximises the full sound potential of your headphones, so now your in ear sound can match the quality of your stage sound… given you have the correct (Meters Music) headphones, of course!
Shop For Meters Headphones


RM 800 EVO II User Manual

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