Pioneer SX-939

AM/FM Stereo Receiver (1974-76)

Description

The Pioneer SX-939 is a highly versatile, big powered FM/MW stereo receiver.

The unit features a parallel push pull OCL power amplifier with less than 0.3% total harmonic distortion, a completely new PLL MPX circuit, frequency linear 4-gang variable capacitor and a newly developed IC AM.

It also has a twin control system and duplication switch, and Dolby adapter in/out terminals with switch.

Specifications

Tuning range: FM, MW

Power output: 70 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 40kHz

Total harmonic distortion: 0.3%

Damping factor: 45

Input sensitivity: 2mV (mic), 2.5mV (MM), 150mV (DIN), 150mV (line)

Signal to noise ratio: 65dB (mic), 70dB (MM), 95dB (line)

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

Speaker load impedance: 4Ω (minimum)

Semiconductors: 3 x FET, 4 x IC, 57 x transistors, 39 x diodes

Dimensions: 520 x 175 x 420mm

Weight: 18.5kg

Accessories: FM T-type antenna