The Peavey Headliner bass head is a 1 1/2 rack space, fully rackmountable 600 watt head. The Headliner is loaded with features, including an on-board optical compressor and tube crunch effect. There's plenty of EQ on-board, including a pre-EQ contour switch, 2 bands of rotary EQ and a 7 band graphic EQ, which is defeatable. There's also an effects loop, so using the Headliner with your favorite effects is a breeze. Add Peavey's patented DDT distortion detection technique and you have the makings of a fantastic new bass amplifier.