To celebrate 20 years of continuous production, Ashdown produced a very special, limited edition ABM EVO-IV head. 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. Like 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. Dimensions: 35 x 474 x 320 mm, Weight 12,5 kg.