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The Ashdown ABM 600H-20TH-LTD is designed and built to celebrate 20 years of continuous production.

Hand built in the UK, The 20th Anniversary ABM-600 EVO-IV is built on the foundations of Ashdown’s latest evolution of its leading ABM range. Designed to match the 20th Anniversary ABM 410T Cabinet, the Ltd Edition ABM head takes on the design styling of a luxury motorcar interior with custom black diamond check vinyl covering and an anodised alloy front panel.

Like the stock ABM-600, the Limited Edition model head features a 600-watt power stage with a variable valve driven preamp section featuring a 12AX7 tube, 9-band EQ, as well as built in compression and a sub harmonic generator. Each Limited Edition 20th Anniversary ABM-600 EVO-IV head is hand made/ hand wired in England. Available in limited numbers, the 20th Anniversary models will run until the end of 2017. Every unit produced will come tested with a hand signed label by, Ashdown Founder and Managing Director, Mark Gooday.

Variable Valve Drive Plus – from zero to rock hero The Variable Valve Drive preamp section enables players to switch from pristine clean, to the fattest, fullest bass overdrive available. The Drive level can be pre-set and kicked in and out via footswitch.

Please note this listing is for the head only.

For more information on the 20th Anniversary models & Ashdown Bass amplification contact Mike on 01273 665427 - [email protected]

  • Power Output 600 Watts Power Requirement 115 - 230 Volts
  • Speaker Outputs 2 x Jack/Speakon outputs
  • Frequency Response -3dB an 17Hz und 30kHz
  • High Instrument Input Impedance 3.9m Ohm, input range 150mV -
  • Low Instrument Input Impedance - 10k ohms Input range 300mv to 40v p - p
  • Line Input Impedance 22k Ohms / Input level 0dBu nominal
  • DI Output 600 Ohms balanced / Level -20dBu nominal With Ground Lift Tuner Output Impedance 22k Ohms, level 0dBu nominal
  • Impedance Minimum 4 Ohms
  • EQ 9-Band Effects Send Impedance 22k Ohm, Level 0dBu nominal
  • Effects Return Impedance 22k Ohms, Input Level 0dBu Nominal
  • Pre-Amp Tubes 1 x 12 AX7 H x W x D (mm) 135 x 474 x 320
  • Weight (kg) 12.5kg