Many people claim they will help the sound. I have a couple on my system except to the amps and it seems to have quieted it down a hair. I'm not sure though. They do protect very well though. For the money the Powervar and Oneac units are a bargain. I seriously doubt a Monster or other brand does any better job at 2-10 times the price. The industrial conditioners HAVE to keep the power clean, especially in a medical lab one would think.