Question about M-Audio Studiophile BX8a Speaker

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Humming BX8 Humming, loud, whether hooked up with Audio input or not. Have a second one and it is fine. The other main speakers are fine.. Prefer not to open it up without a schematic and some advice regarding the location and specs on the power supply capacitors in particular. Could I carry this to any good guintar or bass amp shop and get it fixed locally ?

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  • John Gassaway May 27, 2008

    Thanks for the several suggestions. Right now I am asking around my musician friends to find a good amp repairman. That is a very good speaker and I don't want to cob it up! The soluition sounds simole but I have tackled a lot of "simple" problems that turned into real bears. Thanks again. John

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Hello docjgg,

This sounds like it may be a loose connection (ground) generation common mode noise or it may be a capacitor in the power supply going bad and not providing enough filtering of the AC voltage (allowing for 60 cycle hum). You should get a schematic for the speaker or just take some rule of thumb measurements of the power supply output, with an oscilloscope (you will be looking for ripple voltage, what you could do is use one of your good speakers as a comparison of good to bad.

If you do not want to work on this yourself, you could take the speaker to any TV repair shop or audio repair shop.

I hope this helps

Thank you,

Shuttle83

Posted on May 25, 2008

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