Question about Onkyo GX-D90 Main / Stereo Speaker

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Onkyo SC 570 stereo speaker has hissing sound

One of the two stereo speakers gives a hissing sound. The other one does not. I exchanged the cables between the two and the problem remains. The speaker is 15 years old but worked very well until now.

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  • cattaand Apr 19, 2008

    thanks. you mean I better take it to somebody that knows what he is doing and has the right tools. Can you give me a pointer ?

  • sandaili Sep 29, 2008

    M-audio speaker, brand new. I know it's not blown because you can still get "thuds" out of it by introducing the leads to the powered speaker and also when you turn off the powered speaker you hear a thud.

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If you already switch the speakers to make sure that is NOT the receiver , then theres two things , check the TWEETER or check the capacitor or Crossover inside the speaker box , you gonna need a multimeter for this task . hope it helps

Posted on Apr 19, 2008

  • ALBERT GARCIA
    ALBERT GARCIA Apr 19, 2008

    ok, I suggest to take it to an authorized audio specialist , and also who carries the BRAND ONKYO , dont let them replace any part with some generic one , you have a HIGH END speaker and it should be treated like one for sound quality. try the yellow pages for this information eg. SONY , YAMAHA , BOSE , ONKYO . . . .

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And if you measure distortion, then what? Do you have a scope and a spectrum analyzer and a calibrated sound source?

The Mk.1 Ear can decide if it likes what it hears. Some people LIKE excess bass, for example.

Determine if it's source-related, cable-related, channel-related, speaker-related by swapping or focusing on one at a time and comparing. Try naming the products and look at the manuals for correct setup.

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Just bought second hand Mercury MX4-M in visibly good condition. Very little dust visible on cabinet and cones behind the grills. On closer inspection I can see one of the tweeters have oily substance...


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One test to confirm if the tweeters are working all right is to play a blank FM channel with the FM mute released ( FM mode on Mono ). Turn up the Amplifier volume and you will hear a loud hiss ( like standing next to a waterfall ). Turn the balance control towards each speaker and see if they sound identical.
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You don't say what source(s) are affected. I'm guessing TV or Cable-TV is the problem because music with vocals has voices and you say it sounds ok. Your speakers have no clue whether a sound is a voice or music so that lets THEM out and your receiver doesn't know or care either.

In the modern multichannel world it's usually assumed your electronics are multichannel. This receiver is old-school stereo.

The Center channel is usually where voices are found but some systems (like yours) don't have a Center speaker so they have to be configured to share the Center duty with the front left and Right speakers.This isn't possible or even normally necessary in your case. WYSIWYG

http://www.retrevo.com/support/Onkyo-TX-8222-Receivers-manual/id/469ci869/t/2/

The audio coming in from 'wherever' should be correctly mixed to 2-channels at the source or you'll probably be missing something. I'd look higher up the audio food chain for where the voices are being attentuated. If a cable box is involved I'd look at its audio settings regarding stereo mix-down

Wait, I just had an inspiring thought. Centered voices being mono in nature would partially cancel out if your two speakers were out of 'phase' with each other. Bass would also suffer. Make sure your two speakers are wired identically regarding the red and black (or plus and minus) conductors. If turning the Balance control fully to one side makes bass of voices sound louder you probably have a phase mismatch. Reverse the wiring on either speaker to match the other. There is no absolute right or wrong for phasing as long as they're all the same.

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You want them to be your Main Front speakers, right? The news is not good.

There will be some limitations because you can't extract 'processed' L-R from this receiver. The following will give you good stereo and Front L-R from the 901's but it won't allow central volume control or send them any of the DSP effects you may select. Sorry. If it had a Front L-R Pre-Out you'd be good to go for all functions and listening modes.

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