Pioneer SA-500A Integrated stereo amplifier (1971) Technical specifications: Output power: 13 watts per channel on 8Ω (stereo) Frequency response: 30Hz to 50kHz Total harmonic distortion: 0.5% Damping factor: 40 Input sensitivity: 2.5mV (MM), 200mV (line) Signal to noise ratio: 75dB (MM), 90dB (line) Channel separation: 50dB (MM), 55dB (line) Output: 200mV (line) Output impedance: from 4Ω to 16Ω Semiconductors: 18 x transistors, 6 x diodes Dimensions: 330 x 118 x 316 mm Weight: 5.5 kg Mediterranean Hi-Fi Vintage, before putting its appliances at auction, submits them all to serious and reliable laboratory testing and a restoration to guarantee the perfect functioning over time because it strongly believes that the acoustic of a good vintage Hi-Fi can be matched to a high aesthetic level, along with the pleasure of having “pieces” from the 30s/40s/50s that preserve and increase their value over time. Mediterranean Hi-Fi Vintage also guarantees a professional packaging.