Heathkit AD-40 Stereo Tape Recorder Power output: 6 watts stereo (3 w. per channel) utility rated Power response: ± 2 db 50 to 15,000 cps at 3 watts Total harmonic distortion: less than 2% 50 to 15,000 cps at 3 watts IM distortion: less than 3% at 3 watts Hum and noise: -45 db or better at 3 watts Sensitivity: for 3 watts output, 1.5 mv; microphone, for max. record level, 3 mv; aux. input, for max. record level, .2 volt; low impedance outputs, for aux power amp, 1 volt Power requirements: 105-125 V, 60 cycles, 110 watts Cabinet dimensions: 9¼" H x 22½" W x 14" D Weight: 56 lbs