I bought a PS Audio Premiere Power Plant used. It made a huge difference in my stereo. My VPI Classic sounds better! I think the PPP does the same thing VPI's controller does, except change speed. My back-up CD player, Chambridge Audio, also sounds much better. Everything is more open and more dynamic, also there is a sense of greater quiet. I liked the result so much I bought another unit for my home theater. My plasma TV looks better, and the surround sound is more involving. I was a skeptic at first, but now I consider these things essential. By the way, all my power lines are dedicated ones, so I was surprised how much improvement there was. These are the previous generation and are available on Audiogon for around a grand. I took one over to a friends' house, but he has too many barrier strips and the effect was reduced. I plug everything into them except the Parasound items, Halo amps and phono preamp, because their manufacturer says to plug them directlly into the wall. Halos draw too much anyway, I would need three units just for the stereo, too much except for the factory listening room, which has four and also four dedicated lines! Ah, if price were no object...