Had my Promedia 2.1 for about 2 years or so and I've loved it. Unfortunately, after sitting for 6 months while I was deployed it has started giving off a really bad annoying whine. I've troubleshot it down to the sub giving off the sound. I know this for sure, because once the whine started I unplugged everything from the sub and it was still there until a unplugged the power to the sub. The only "fix" I've found is if I run some bass heavy music through it for a couple minutes the whine will then go away for about 10 minutes and then returns. I thought it might have been some issues with it sitting next to my computer tower, some kind of interference, but I isolated the sub and moved it away from everything else and the problem still exists. Any ideas whats wrong and If I can fix it?
-Thank You.