Pioneer SX-838 Receiver (1974)
This Pioneer SX-838 receiver was third from the top of the line, behind only the SX-939 and the TOTL SX-1010. It's conservatively rated at 50 watts per channel into 8 ohms.
Its FM tuner offers high sensitivity and excellent rejection characteristics thanks to its front end equipped with a frequency-linear 4-gang variable capacitor and two MOS FETs.
In terms of power, the unit produces 50W + 50W of continuous RMS power (both channels driven at 8 ohms) with total harmonic distortion of less than 0.3% - remember that this figure is measured and guaranteed over the entire spectrum from 20 to 20,000Hz.
The SX-838 is distinguished from all other receivers in its price range by offering switched-turnover flexibility in its tone control operation, permitting the creation of a variety of tonal characteristics to match your room's acoustics or your mood.