The Pioneer SA-8500 is a 2-channel integrated stereo amplifier featuring defeatable, twin bass and treble controls, balance control, microphone input with level control, loudness switch, muting switch, low and high filter circuits and connections for two speaker systems.

Specifications
mkI
mkII
Power output: 60 watts per channel into 8 (stereo)

Frequency response: 7Hz to 40kHz

Total harmonic distortion: 0.1%

Damping factor: 30

Input sensitivity: 7.5mV (mic), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 65dB (mic), 70dB (MM), 90dB (line)

Output: 150mV (line), 30mV (DIN), 1V (Pre out)

Semiconductors: 45 x transistors, 27 x diodes

Dimensions: 420 x 150 x 345mm

Weight: 13kg
Year: 1976