X 120.44CH Class AB Power AmplifierDual Variable low pass Filter (40Hz-10KHZ)Dual Variable High pass Filter(20Hz-10KHZ)FULL RANGE (5Hz-85KHz) with BASS BOOST(0-6-12dB)Double transformer, with wired remote controlHeavy heatsink better for heat radiationFuse Protection:30AX3SGND:CH1 CH2 CH3 CH41.Class..