Bruce Moore Amplifier 70/225 Watt     70 watts per channel (Ultralinear mode) 37 watts per channel (Triode mode) 4 & 8 ohm outputs "destined to be a sought after component     Specifications Power Output 70 watts ultralinear mode, 37 watts triode mode THD .1%, 20 Hz to 20 kHz @ 1 watt; 1%,  20 Hz to 20 kHz @ full power Frequency Response +0,-1 dB @ 1 Hz to 200 kHz (1 watt) Input Impedance 412K ohm Input Sensitivity 1.3V for full output Outputs 4 & 8 ohm Damping factor 15 Absolute Phase non-inverting Tube Complement 4ea 6922, 4ea 6550/KT88 Features triode/ultralinear switch, independent biasing for each output tube Dimensions height = 7.5" (191mm),  width = 15" (381mm),  depth = 15" (381mm) Shipping Weight 70 lbs.