Heathkit AA-191 Mono Amplifier Power output: 3 watts Heath Utility Rated Power response: ± 1 db, 60 cps to 15,000 cps at 3 watts output Harmonic distortion: Less than 3% 60-15,000 cps at 3 watts output Intermodulation distortion: Less than 3% at 3 watts output, 60 and 6,000 cps signal mixed 4:1 Hum and noise: 70 db below 3 watts Input sensitivity: 0.15 v for 3 watts output, crystal phono and tuner Outputs: 4, 8 and 16 ohms Controls: bass treble volume input selector switch on-off switch Tube complement: (1) - EF86 (1) - EL84/6BQ5 (1) - 6X4 Power requirements: 117 v. 60 cycles, 49 watts Color and finish: Satin black, ivory face panel Weight: 6 lbs