Zpre3 Features Front panel LCD function display with dimming Automatic turn on volume memory Favorite volume memory with remote control button 2-way RS232 w/ exact volume control & feedback Discrete commands for all functions Rename inputs to match connected source 5 audio inputs including a front panel Aux input Bypass input integrates easily w/ a Sonos Connect® etc. Bass, treble and balance adjustments by remote control Variable and fixed stereo outputs Variable and fixed mono/subwoofer outputs 12dB auto gain offset at front panel AUX to match levels of other sources 12V trigger output and rear panel IR input Control4 Driver available Rack mount kit sold separately Specs Frequency Response:10 Hz - 40 kHz, +0/-0.5 dB Total Harmonic Distortion: (20 Hz - 20 kHz)100 dB, input shorted, IHF A-weighted>90 dB, input shorted, unweighted DC Trigger Output:12Vdc, 50ma AC Power Requirement:5 Watts powered on0.5 Watts in standby100 - 250 VAC 50/60 Hz DimensionsWidth: 8.5" (220 mm)Depth: 10" (254 mm)Depth: 12" (305 mm) with AC cord and cables connectedHeight, with feet: 2" (51 mm)Height, without feet: 1.75" (45 mm), 1U WeightNet: 4.0 lbs (1.8 kg)Shipping: 7.0 lbs (3.1 kg) Rack Mount AccessoryMay be Purchased SeparatelyZRK