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Hadley Laboratories 622

Stereo Power Ampliifer (1965)

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Hadley Laboratories 622

Specifications

Power output: 40 watts per channel into 10Ω (stereo)

Frequency response: 15Hz to 20kHz

Total harmonic distortion: 0.7%

Damping factor: 250

Input sensitivity: 1.1V

Signal to noise ratio: 80dB

Speaker load impedance: 4Ω to 20Ω

Semiconductors: 27 x transistors, 12 x diodes, 8 x rectifiers, 4 x zener diodes

Dimensions: 12.5 x 4.75 x 10.87 inches

Weight: 25lbs

Year: 1965

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