Key features of the CX-7 Home Theater Power Amplifiers include: 140 Watts per channel Four custom designed, hand-graded output transistors per channel Oversized toroidal power transformer with extraordinarily low DC resistance and thermal protection High-power supply voltage for extra headroom at the outputs Stable with mismatched, reactive, or unusual loads Compatible with 2ohm speaker impedances THX Ultra2 Certification Thermal protection against overheating Speaker protection against DC and frequencies below 10Hz Protection against short circuits, device failures, miswiring, and internal faults Trigger input for power control from an external device RCA and XLR inputs Ground Lift switch per channel Gold plated input and output connectors Rackmount option available Power output: 140 watts per channel into 8? (7 channels) Frequency response: 10Hz to 100kHz Total harmonic distortion: 0.02% Damping factor: 850 Gain: 29 dB Input sensitivity: 1V Signal to noise ratio: 110dB Speaker load impedance: 2? (minimum) Dimensions: Height5 Width16.2 Depth19.5-inches (including handles) 17.12-inches (not including handles) Weight: 53lbs The Lexicon CX-7 amplifier US MSRP was $3995 in 2004.