Rack mountable bass head from the ABM EVO IV series with the power stage of 600 W. The head pairs class-leading preamp sophistication with uprated powerhouse performance and an all-new 9-band EQ with familiar Bass, Middle and Treble controls and six sliders providing precision cut and boost. The 12AX7 tube enables players to dial in a sound from pristine clean, to the fattest, fullest bass overdrive currently available. The ABM series features the new Input VU meter, allowing the amp to quickly find the sweet spot for the instrument. Other ABM favourite features is the One Knob Dynamic Compressor sub octave note for huge bass tones with powerful, even sound, guaranteed to help your bass fill out any mix. The ABM Sub-Harmonic generator functions adds an octave below the notes being played bringing fullness to any bass part. Paired with our FS-4 footswitch (not included) the ABM comes alive for onstage use, enabling on-the-fly tonal gearshifts. The head features a tuner output with the mute function, Line out, transparent FX loop and a Line Input. The dimensions of the device are 88 x 482 x 293 mm and the weight 12 kg.