I have a set of M-Audio AV40s connected to my iMac, and i really enjoy them. The problem I seem to be having from time to time is that one of the speakers, usually the one that is not connected to the power, shuts off, and I have to turn the power switch off and on again in order for it to work. Has anyone else had an issue like this before? I have some decent speaker wire connected between the two, but if it was a speaker wire problem, wouldnt turning the power off and on play no part in this? Also, should I have them connected the way I have them currently, via audio out, or should I connect them via USB? If USB would be better, does anyone have any suggestions on what equipment I would need to purchase? I have a Creative x-fi Surround 5.1 Pro device lying around, and I thought that might do something, no?