Pioneer - SA-510 Solid state integrated amplifier

Pioneer SA-510 Amplifier
Integrated stereo amplifier produced between 1980 and 1981.
Represents one of the entry-level models of the famous "Communication Series" / "Blue Line" by Pioneer, characterized by the transition to the 1980s hi-fi design with a blue fluorescent display (VFD).

Main features and description
Design and front panel: Brushed aluminum front panel with solid metal knobs and levers. The distinctive visual element is the blue/azure fluorescent display/VU-meter (Fluoroscan) that indicates the output power in Watts into 8 ohms per channel.
Power output: 33 Watts per channel RMS into 8 Ω.
Total Harmonic Distortion (THD): 0.03% (very low for its class).
Signal-to-noise ratio: 68 dB for the Phono (MM) input and 85 dB for line-level inputs (Tuner, Aux, Tape).

Connectivity:
Dedicated MM phono input.
Line inputs: Tuner, Aux, Tape 1 and Tape 2 (with recording monitor function).
Outputs for two pairs of speakers (Speaker A / B).
Tone controls: Bass and Treble knobs with discrete steps, balance, Loudness filter to emphasize bass and treble at low volume.