I really appreciate you guys offering assistance.
Though, I'm pretty sure it can't be the speakers, because it never did the popping noises with the previous sound card (it was really old and had other issues). Also, the popping stops after a while, and corresponds with clicking on things that make noise.
This would have to either be the sound card itself (hardware), or the
drivers or some other software. I was really hoping that this would be a well known issue, and that maybe there'd be a fix. I've seen 1 other thread (mentioning pops corresponding with clicking), but it went unresolved...