The Onkyo M-5570 is a power amplifier that was part of the Integra series, manufactured by Onkyo between 1989 and 1992 in Japan. It features a classic black finish and measures 465 mm in width, 184 mm in height, and 422 mm in depth, including the wooden side panels. Weighing in at 21 kg, this amplifier was originally priced around 2,000 DM in 1991. The M-5570 can drive two speaker pairs and is noted for its impressive specifications: it delivers continuous power of 170 W per channel at 8 ohms and 250 W per channel at 4 ohms with both channels driven, maintaining total harmonic distortion at a low level of 0.003%. It also has dynamic power ratings of 210 W at 8 ohms and 350 W at 4 ohms. Its frequency response ranges from 1 Hz to 100 kHz with a deviation of +0, -1.5 dB. The attenuation factor is rated at 140 at 1 kHz for 8-ohm loads, and it features a noise voltage spacing of 120 dB when short-circuited. The amplifier includes two large VU meters for visual monitoring of output levels.
