Pioneer QA-800A Quad Amp   VERY RARE  Power output: 27W/ch into 8Ω (stereo), 20W/ch into 8Ω (quadraphonic) Frequency response: 15Hz to 50kHz Total harmonic distortion: 0.5% Damping factor: 40 Input sensitivity: 2.5mV (MM), 200mV (line) Signal to noise ratio: 80dB (MM), 90dB (line) Output: 200mV (line), 0.5V (Pre out) Speaker load impedance: 4Ω to 16Ω Semiconductors: 2 x FET, 65 x transistors, 15 x diodes Dimensions: 430 x 138 x 337mm Weight: 10.9kg  $650