The Pioneer SX-800 A is a vintage stereo receiver that was manufactured by Pioneer in Japan during the late 1960s. Notable for its silver chassis and classic design, the SX-800 A features a robust construction with dimensions of 445 x 150 x 440 mm and a weight of 18.5 kg. This model is part of a series that includes various other models with similar aesthetics and functionality. It does not come with a remote control and has a power consumption profile typical of its time. The receiver offers multiple input options including Phono ceramic, Phono MM, Tape, and Aux inputs, catering to a variety of audio sources. Its amplifier delivers a continuous power output of 38 watts per channel at both 8 and 4 ohms, with a dynamic power capacity of 90 watts at those impedance levels. The total harmonic distortion is kept below 1% at 1 kHz, ensuring clear sound reproduction. The frequency response ranges from 30 Hz to 20 kHz, maintaining a tight ±1 dB tolerance. Audio tuning features include tone controls for bass and treble, each adjustable to accommodate user preferences, as well as loudness and high and low filters. The radio tuner receives FM and MW frequencies with input sensitivities of 2.2µV for FM and 12µV for MW. Special features of the SX-800 A include being one of the last generation tube receivers, which adds to its appeal among enthusiasts of vintage audio equipment.