Description Excellent for powering entire indoor our outdoor zones of up to 8 speakers at high power! 120 watts x4 @ 8 Ω 150 watts x4 @ 4 Ω or 2 Ω 8 speaker connections (A and B outputs for both channels) High current for stable operation at 2 Ohms Class AB input stage plus premium Class D power stage Bus input with looping outputs Audio sensing auto-on trigger, independent for each zone 12 volt auto-on trigger inputs, one for each zone Master 12V trigger input to turn all zones on-off together Looping 12 volt trigger outputs Speaker level input for expanding systems w/out pre out jacks Mono mode combines L and R for single speaker applications Separate level controls for all 4 channels Detachable speaker connectors accept up to 12 gauge wire Short circuit and overheat protection with front panel indicators 0.5 watt standby power consumption meets Energy Star & EU specs Compact 1u chassis size Rack mount kit included in the box