Ashdown Engineering


The Interstellar isn't just a bass amp; it's a testament to the enduring partnership between Ashdown and iconic bassist Guy Pratt. Drawing inspiration from Guy's extensive history with Ashdown's ABM-900 series, we embarked on a journey to create something extraordinary. This collaboration gave birth to a 600-watt powerhouse of a bass amp that redefines what's possible.
Central to The Interstellar's design is its emphasis on tonal versatility. A sophisticated 9-band EQ and valve drive provide bassists with unparalleled control over their sound, ensuring that every note resonates with precision and power. What's more, the amp includes foot-switchable compression and sub harmonics, meticulously tuned to Guy Pratt's exacting standards.
The name "Interstellar" pays homage to Guy's current band, "The Saucer Full of Secrets," and their rendition of "Interstellar Overdrive." It reflects a momentous occasion in music history, brought to life by the unmistakable sound of Guy's bass. The amp's custom wood enclosure is not just visually striking but also acoustically tuned for optimal performance. Additionally, an optional rack kit allows for rack mounting, providing flexibility in how you set up your rig.
The Interstellar is more than an amp; it's a celebration of Guy Pratt's 40-year career, Ashdown's unwavering support, and a shared passion for exceptional British amplification. Turn it on and embark on a sonic journey that transcends boundaries – this is The Interstellar, where tradition meets innovation.
Guy had a few words to say on the amp “I can’t tell you how proud it makes me to have a signature amp with my Ashdown family, who’ve been with me every step of the way of my 40 year career.
We’ve been tinkering with bits and pieces for years, and this combines our shared passion for great traditional British amps with everything I know and trust about my ABMs.
It’s not about bells and whistles, well apart from the dedicated Taurus input, it’s about solid, shapeable, deliverable power. 
Along with my 3x10s this is my ultimate dream rig. Turn on and trip out!”
The head is designed to be used in its custom wood sleeve however the head can be rack mounted via an additional rack kit sold separately.
Please Note:
Direct purchases not available from the United States
Find your local Ashdown Dealer HERE
Guy Pratt
Sideman to the stars, Guy is a well respected bass player and he has worked with the likes of Robert Palmer, Bryan Ferry, Womack & Womack, and even The Smiths amongst others. He was thrust into the global premier league of bassists when David Gilmour asked him to play for Pink Floyd.

He also toured as part of Pink Floyd guitarist David Gilmour’s On an Island band, alongside another Pink Floyd member (and his father-in-law), Richard Wright.

Guy has also played on countless hit records for Tom Jones, Sophie Ellis Bextor, Iggy Pop, The Pretenders, Ronan Keating, Electronic, Echo & the Bunnymen, The Orb, Natalie Imbruglia, All Saints, Bond, and Elton John. As well as touring with Coverdale Page, The Power Station and Gary Moore.

Guy has long used Ashdown amplifiers and we have collaborated on many custom heads for his use in the studio and around the world. This is the first time you have the opportunity to own the same amp fit to grace the same space as some of the finest musicians in the world.



  • Power Output - 600 Watts
  • Power Requirement - 115-230 Volts
  • Speaker Output - 2 x Jack/Speakon outputs
  • Frequency Response - -3dB @ 17Hz und 30KHz
  • High Instrument Input - Impedance 3.9m Ohmns, input range 150mV
  • Line Input - Impedance 22k Ohmns, input level 0dBu nominal
  • DI Output - 600 Ohm balanced, Level 0dBu nominal
  • Tuner Output - Impedance 22k Ohms, Level 0dBu nominal

  • Line Input - Impedance 22k Ohmns, input level 0dBu nominal
  • DI Output - 600 Ohm balanced, Level 0dBu nominal
  • Tuner Output - Impedance 22k Ohms, Level 0dBu nominal
  • Impedance - Minimum 4 Ohms, Level 0dBu nominal
  • Effects Return - Impedance 22k Ohm, Level 0dBu nominal
  • Pre-Amp Tubes - 1 x 12AX7
  • H x W x D (mm) - 175 x 495 x 310
  • Weight (kg) - 13.5

Watch Guy Pratt Demo the Interstellar-600

9 Band EQ
This consists of BASS, MIDDLE and TREBLE controls with three sliders placed between each control. These can be used in a number of ways:

Firstly as a very simple Bass, Middle and Treble tone control section as found on older traditional amplifiers. This is done by leaving the two sets of sliders interposed between these controls set in their centre positions and using only the BASS, MIDDLE and TREBLE controls to alter the overall tone.

Secondly, if more control is required then the sliders can also be used to tailor the E.Q. In the regions between the main tone controls. This provides
Tube Drive
Allowing you to blend a Dual Triode Tube amplification/overdrive section into your sound, add either tonal character i.e. warmth or a slight edge in the sound through to an increasing degree of Tube distortion/overdrive.

Professional Connections
Not that you'd expect any less, The Interstellar is loaded with connectivity. A tuner output, Line out, transparent FX loop and a Line Input for the connection of an external sampler or sound source (ie Moog Taurus Pedal). Output muting cuts the signal from the DI output but leaves the tuner output 'live', allowing the player to tune up in silence.
CL-310 the perfect combination!
Taking inspiration from the PA cabinets of yesteryear the CL-310 is a very unique and special cabinet for bass guitar. Guy teams up his Interstellar head with two of our CL-310 custom shop speaker cabinets for a killer on stage tone!
Flexible Footswitching
Paired with our FS-4 footswitch (not included) the Interstellar comes alive for onstage use, enabling on-the-fly tonal gearshifts. With footswitchable Valve Drive, Compression, EQ and Sub Harmonic Generator.


Download the Interstellar-600 user manual

Recently viewed