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Onkyo A-809

Stereo Integrated Amplifier (1991-95)

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Onkyo A-809


Power output: 105 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.008%

Damping factor: 150

Input sensitivity: 0.16mV (MC), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 75dB (MC), 94dB (MM), 107dB (line)

Output: 150mV (line)

Dimensions: 455 x 170 x 420mm

Weight: 16.7kg


instruction/owners manual   English - mvdwoude

instruction/owners manual   Nederlands - jhlnleu

service manual   English - elmopaul

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Reviewed Oct 16th, 2016 by S.Joshi

Great piece of equipment. Reported known issues of input selector switch going awry. This is neither a design flaw nor any component failure, as apprehended in lots of comments. Its just the rotary encoder which needs cleaning. I have known that lot too many Onkyo 807 and 809s have been salvaged by their users in past on account of the hunting phenomena of the input selector switch. Oxidation of contacts is natural for DC circuits. Craig provides the perfect solution. Just clean this switch with deoxit and save this decent piece of equipment. This rotary switch also sends an assurance indication to the microprocessor that the desired input has been reached, which then locks the servo motor in that position. Hunting of the input selector switch takes place in the event the servo motor doesn't get a confirmation as to whether the desired input has actually been selected or not.



re: A-809

issues with control's input selector will at times start switching on its own. source selector is touche has to be coxed into direct or tone, or it will not operate on both channels it will be left one time and right the next. any solutions would be helpful. it doesn't sound bad but it replaced a sansui au-717 that some one helped themselves to.

re: A-809

Try spraying contact cleaner inside the selector switch. I believe they have some sort of optical switching system that is affected by too much dust.

re: A-809

I have the same problem. I sent in in for repairs..they did not fix it. It hunts. drives me batty. I have given up so now I am in the market for a new amp.

Trouble is finding one that performs as well at a decent price. Seems that I will need to spend between 3,000 and 5,000. OUCH!!!! The current Onkyo are not even the same beast. No comparison


karodimitrov's picture

re: A-809

LB 1638,TA 7291S-these two ICs command the rotary encoder electromotor. And if he moves randomly-think one of them is screwed.

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