ZoneMaster 4 Features 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 Specs Power Output – RMS, Both Channels Driven (20 Hz - 20 kHz)120 watts x 4 @ 8Ω150 watts x 4 @ 4Ω or 2Ω Minimum Speaker Impedance:A+B Outputs of a Single Channel: 2 ΩNote: Continuous operation at this minimum impedance might require additional ventilation for the amplifier. Frequency Response:20 Hz - 20 kHz, +0/-0.25 dB5 Hz - 50 kHz, +0/-3 dB Total Harmonic Distortion:< 0.05 % at typical listening levels< 1.0% at full power Interchannel Crosstalk: 70 dB at 20 kHz Total Gain: 29 dB (Level controls set to Maximum) S/N Ratio: >112 dB, input shorted, IHF A-weighted DC Trigger Requirements: +9 Vdc to +12 Vdc, 5 mA Audio Trigger Requirements: 2 mV audio signal AC Power Requirement:600 Watts maximum60 Watts typical (music playing in all zones)30 Watts idle (all zones on)15 Watts idle (one zone on)100-250 VAC 50/60 Hz (automatic) Dimensions:Width: 17.25" (437 mm)Depth: 14.25" (362 mm)Depth: 16" (406 mm) with cables connectedHeight, with feet: 2.5" (63.5 mm)Height, without feet: 1.75" (45 mm), 1U Weight:Net: 12 lbs. (5.5kg)Shipping: 18 lbs. (8.2 kg)
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