snook2, i used to think the same, but having switched from an APC smartUPS 1000 to a Panamax MAX 5300 it was.... astounding. video looked better (remember how dependant NTSC is, clocking on 60hz) and i would say a general 15% improvement on sound (this coming from a skeptic who didn't buy into the speaker cable / power / ic thing for years). the problem is, computers like things REALLY clamped down and exact and that's what you get with these UPS units. audio, often you're best off plugging stuff into the wall (esp. with a hospital or audio grade outlet) unless you're worried about protection, but even good units like the panamax only offer like 5-10k of insurance which wouldn't cover many of the systems i've read about here).