For you guys who don't think a power cord change for the Purepower makes a difference in the performance of your system, I've tried a number of them from fairly expensive to very cheap. They can make a positive or negative difference. You can improve on the performance of the sound coming from your speakers (top to bottom). What have I tried: of course, the stock cord, VH Audio Flavor 4, Silver Audio Wattmaster, Acrolink w/ Oyaide Connectors, VH Audio Airsine plus others. Since the purchase of new speakers, I decided to pull out an old standby, the Volex 17604 and this cord has suprised me. With my current setup it is actually producing better clarity, transparency detail, and spatial cues. It needs more time connected to the Purepower (1050) since its only been connected for a day, but the preliminary sound is an improvement on the previous Flavor 4 cord and the stock cord which I re-tried after several months.