Onkyo Integra M-508 Stereo Power Amplifier 200W Dual Mono

CONDITION

This unit is in excellent condition and works properly. All of the lamps illuminate properly.

ABOUT THIS ITEM

The Onkyo Integra M-508 (Grand Integra) is a high-end stereo power amplifier made in Japan by Onkyo, produced from 1986 during the golden era of Japanese hi-fi as the smaller sibling of the flagship M-510, sharing the same core technology. It delivers 200 watts per channel into 8 ohms (290 watts into 4 ohms) with extremely low total harmonic distortion of just 0.002% and a high damping factor of 140. Its defining feature is a Real-Phase circuit that reproduces accurate phase and soundstage: dedicated power in-phase transformers for the left and right channels are placed in the current path to prevent out-of-phase speaker current from returning to the amplifier and to eliminate common-mode noise from the AC line. It uses an independent left/right dual-mono construction with a 4-transformer power supply, a triple push-pull power transistor output stage, and eight capacitors totaling 80,000 µF. A linear switching method with high-bias, wide-bandwidth (20 MHz) transistors widens the Class-A operating range and suppresses crossover distortion, and it features large switchable peak meters with green illumination.

・Power Supply Voltage: AC 100V, 50/60 Hz (Japanese domestic model). Please use a suitable step-down transformer in 110–240V regions.

— Grape Japan