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Onkyo Grand Integra M-508 power amplifier | Stereophile.com
The Onkyo A-9010 is the single best amplifier I've heard for anywhere near the price. IMO, it should be the default answer to the “budget amplifier” question that gets asked so often :
Onkyo A-9010 review | What Hi-Fi?
Onkyo A-9050 Review | SoundVisionReview
ONKYO Integra M-5030 Super Servo Stereo Power Amplifier Delta Power Su
Onkyo TX-8140 Stereo Receiver Review: Plenty of Connections in This Solid Receiver
Best 80's Onkyo Integra amps? | Audiokarma Home Audio Stereo Discussion Forums