Switch the speaker cable to the other speaker and see if the problem moves with the cable. If we are lucky it's just a bad cable.
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No, I tried a couple of speaker cables. And there's only one cable between the two speakers, the other speaker has a power supply and amplifier built in.
I wonder if the audio input jack got tweaked a little bit. What kind of connection is it into the powered speaker? (what model # M-audio so I can take a view online)
They're M-Audio Studio Pro 4 desktop monitors, which I don't see on their site any more.
Oh, wait. They're "Studiophile DX4" speakers. And they hum when the audio input is unplugged, too.
And in fact, the right speaker is completely dead. It just hums.
where you using the 1/4" or the RCA inputs? I'm wondering if there is something causing a short between the shield and tip on one of the 1/4" inputs. Maybe a piece of schmadda got in there.
does the left work at all? ETA: removed IM info so the spam bots arent tempted
Is there any difference between a coaxial digital audio cable and a "regular" rca cable?
Assuming there is a difference:
Is there any difference in quality between using a coaxial digital audio connection and an optical one?
Is there any difference between a coaxial digital audio cable and a "regular" rca cable?
I'm pretty sure the answer is "no," but NoiseDesign or omnis audis would be able to give you a more confident and correct answer.