Product highlights: 8-channel amplifier with 4 independent playback zones 45 watts per channel into 8 ohms (1,000 Hz) with one zone driven 90 watts per channel into 4 ohms (1,000 Hz) with one zone driven 180 watts per channel into 8 ohms in bridged mode (one zone driven) high-efficiency Class D amplification thermal fan cooling signal-to-noise ratio: greater than 90 dB rear-mounted, independent level controls for each zone 3 output filter settings for each zone full-range (full): the entire, unfiltered audio signal is sent to the speakers low-pass (lp): frequencies from 20 Hz to 160 Hz are sent to the speakers — great for passive subwoofers high-pass (hp): frequencies from 80 Hz to 20,000 Hz are sent to the speakers Connections: Bus A and Bus B stereo RCA inputs let you assign connected sources to any zone discrete "local" RCA inputs for each zone 12V trigger input and output for automated turn-on signal-sensing input activates the amplifier when a source is detected global trigger input/output detachable Phoenix-style speaker connectors support up to 14-gauge wire removable AC power cord Dimensions and other info: rack mountable chassis (rack mount ears included) 17-1/8"W x 1-3/4"H x 9-3/4"D (1U rack space) weight: 8 lbs. warranty: 2 years 60-day returns MFR # 2800-853906