Originally Posted by fastl
Not trying to make light of scooter's misfortune with his Qualia, but it does illustrate what can result from abnormal power voltage conditions. IEEE did an extensive study of power related failures a number of years ago, and they found that most power supply failures occurred during under voltage or sag conditions. Contrary to what the skeptics believe, there are good reasons for having power conditioning equipment installed to automatically disconnect under abnormal line voltage conditions.
Quite true. But let's also define what a "good" power conditioner is. Good does not mean automatically Monster or Richard Gray. Yes, both of those are good units but greatly overpriced.
A basic surge protector from Home Depot or a <$500 computer UPS is all you really need for protection. Filters and balanced power systems are the next step up to help reduce line induced noise but they do very little with digital equipment. With an all HDMI signal chain, these devices do nothing for image quality and very, very little to improve audio.