ONKYO A-9050 - Legendary Machine, Beautiful Sound

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This is an Onkyo integrated amplifier, model A-9050.
Operation has been confirmed.
It has the beautiful sound quality characteristic of ONKYO.
This listing is for the A-9050 unit and its power cable.
No claims, no returns, please.
Used materials will be used for packaging.
Non-smoking, no pets.


Equipped with a Wolfson WM8718 DAC that supports 192kHz/24bit. Features 3 digital inputs.

Furthermore, it is equipped with our proprietary DIDRC (Dynamic Intermodulation Distortion Reduction Circuitry). This circuit is designed to suppress dynamic noise. It investigates the mechanism of beat generation, which causes intermodulation distortion noise in digital audio. The company explains it as a revolutionary circuit with overwhelming amplification performance up to the MHz range, a response speed that reaches up to 1000V in an instant of 1 microsecond (1/1,000,000th of a second), and a noise level suppressed to below -140dB, far below the limit of human hearing (approximately -120dB).

The power amplifier section features a discrete configuration and is equipped with a 3-stage inverted Darlington circuit that significantly improves transient response characteristics. The rated output is 75W+75W (8Ω), frequency response is 10Hz-100kHz, S/N ratio is 110dB, and compatible impedance is 4-16Ω.

Equipped with carefully selected components, including two custom-designed 10,000μF electrolytic capacitors.

It also features a reinforced power supply circuit with a large-capacity EI transformer and two custom-designed 10,000μF electrolytic capacitors. In addition, it includes features such as Optimum Gain Volume which prevents sound from thinning out at low volumes, Direct Mode which bypasses the tone circuit and shortens the signal path, and the proprietary Phase Matching Bass Boost technology, which is said to achieve rich bass and clear mid-high frequencies.

The chassis also received special attention. It employs a flat chassis that suppresses harmonic vibration using 1.6mm thick steel plates, and the front panel and volume knob are made of highly rigid aluminum material with vibration countermeasures. The heatsink is a large, extruded aluminum type with high heat capacity and strong resistance to thermal changes.