Hey guys, I posted this in the electronics forum, but didn't get any bites. Hope no one minds if I repost here as well... Aguilar obp-3 with vol, vol, treb/bass stack, sweepable mid, and tone pots. Nordstrand NJ5st pair (sick...absolutely sick. Mr. Nordstrand does a great job) Here's the deal: there is this subtle "muah" sound going on that shouldn't be. Normally I'd think "muah" is great, right? Well, this happens when open strings are plucked, and sounds like this: the note is produced clean, then gets a bit lounder and loses focus, almost like a single instance of and out-of-phase harmonic beating. After boosting/cutting settings, I've narrowed it down to the tone pot. The only way to completely get rid of it (at least to my ears) is to turn the tone pot all the way down. My questions are these: 1. anyone else ever had a tone pot do this? 2. could it be something else and the tone pot simple helps it be heard? 3. if it is the tone pot, could it be a grounding issue, or is it probably a bad pot? 4. does it make absolutely no sense, and I should go back to trying to isolate the sound? If you'd rather respond in the other forum, here's the link: http://www.talkbass.com/forum/showthread.php?t=194362 Thanks for any help!