I have some BOSE sattelite speakers & base box running through my amp, which my PC sound card is running through. Anyway, the left speaker has a popping sound every 30 seconds give or take. Seems more often sometimes, and less often other times. I have swapped the speaker out with the right speaker, and I still hear the popping on the left. I then tried different speaker wire, and still hear the popping on the left... I then tried running the wire straight from the amp to the speaker, without going through the base box. Still cracking. Last, I switched the speakers from the "A" outputs on the back of the amp to the "B" outputs.. Still hear the sound. ARGH! Any ideas? I don't think it's a problem with the amp because I had other speakers on it before this without any trouble. I did NOT have the other speakers running through the base box though, so that's one thing different, but I already tried this without the box without success.. Any thoughts? Thanks!