Pioneer AM/FM stereo receiver model
SX-780. From 1978 - 1980. The SX-780 was the last of the 700 series
receivers. It was rated at 45 watts per channel. List price in 1978 was
$325. Features tuning meter, low filter, FM muting, one aux, phono inputs,
Two tape in/outputs, separate bass and treble controls. Notice the model
ending with 80 has the black face meters, along with the power watts meters.
The series ending with 50 has the white face meters and doesn't have the
power watts meters. Kenwood and Pioneers tuner face are the same.