The Pioneer SX-690 is an AM/FM stereo receiver with 2 hybrid ICs power amplifier output containing bias, driver and output stages in quasi-complementary circuits. Output is direct-coupled OCL following a first-stage differential amplifier.
Features include Pioneer's exclusive PLL MPX IC incorporating automaitc pilot signal canceller and a CR-type tone control network.
Tuning range: FM, MW
Power output: 30 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 60kHz
Total harmonic distortion: 0.1%
Signal to noise ratio: 75dB (MM), 90dB (line)
Dimensions: 435 x 144.5 x 314mm
Weight: 8.9kg
Year: 1978