Description
Description The Heathkit AA-121 high fidelity stereo amplifier incorporates two complete amplifier channels and a common power supply which provides B+ voltage with negative bias voltage and filament voltage to both channels. Each channel has separate input level and bias adjustment controls. The function selector switch facilitates the selection of either stereo or monophonic operation. Specifications Power output: 40 watts per channel into 8Ω (stereo), 80 watts into 8Ω (mono) Frequency response: 20Hz to 20kHz Total harmonic distortion: 1.5% Damping factor: 16 Input sensitivity: 0.95V Signal to noise ratio: 85dB Speaker load impedance: 4Ω to 32Ω Semiconductors: 4 x silicon diodes, 1 x selenium diode rectifier Valve complement: 2 x 6AN8, 4 x EL34 Weight: 35.75lbs Perfect Working Condition Year: 1962