The audio input shall be electronically balanced with a 10‑kOhm impedance and accept a nominal –2.0 dBV (0.8 V rms, 1.1 V peak) input signal. Three XLR female input connectors shall be provided, one for the subwoofer and two for satellite loudspeakers. DC blocking and RF filtering shall be provided, and CMRR shall be greater than 50 dB and typically 80 dB (50 Hz to 500 Hz). Two output connectors shall be provided for routing balanced audio and 48 V of DC power to the satellite loudspeakers.
Power requirements shall be nominal 100 V, 110 V, or 230 V AC line current at 50–60 Hz. UL and CE operating voltage range shall be 100 to 240 V AC. AC power connectors shall be powerCon 20 with looping output. Current draw during burst (< 1 sec) shall be 1.1 A rms at 115 V, 0.6 A rms at 230 V AC, and
1.3 A peak at 100 V AC; current inrush during turn‑on shall not exceed 6.6 A rms at 115 V AC, 3.7 A rms at 230 V AC, and 7.2 A peak at 100 V AC.
Dimensions shall be 19 inches wide x 11 inches high x 12 inches deep (482 mm x 279 mm x 305 mm). Weight shall be 30.8 lbs (13.97 kg).