For me a power conditioner isn't a factor for sound or video but since I have several pieces of equipment including two multi-channel power amps, with all the cables hidden behind the racks it all but eliminates the hum in the speakers. In my mind, though, the biggest plus is the delayed and sequential on/off capabilities which reduce the power surge when everything is powered up and prevents pops in the speakers caused by the amps which would occur if they were not sequentially powered down.