Question about M-Audio Studiophile BX8a Speaker
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
Posted on May 25, 2008
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Posted on Jan 02, 2017
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