ONKYO Integra A-820GTR Integrated Stereo Amplifier. ONKYO Integra A-820GTR. Type: Integrated amplifier. Total harmonic distortion (20Hz to 20kHz): 0.008%/0.006% (AUX → SP Out, at rated output / at 1/2 output) 0.003% (Phono MM → Rec Out, 3V) 0.01% (Phono MC → Rec Out, 3V).
eBay