It's my belief because I don't have any valid explanation just yet.

Although, after some online research, it may be that some of their other electrical appliances (hot tub, heater, etc) could be contributing to drops in power that adversely affect the computer-based equipment. We have to wait for results from PGE.

Good points Chris. If a line conditioner can't power an amp, are they only used for source components? I was considering using one behind my plasma, but now I may just stick w/ an in wall surge suppressor.