The power supply for my Rega RP3 developed a hum, which seemed to be getting worse, so I had to replace it. Upgrading to a PSU seemed sensible, if only because it would let me change speeds at the touch of a button. I bought one. It arrived yesterday, and I am just completely blown away... It seems a staggering improvement. I could hear extra instruments backing Kate Bush in The Kick Inside and everything suddenly seemed in time in New Order's Temptation 12". Therefore I have two questions: What's going on? Does anybody know why this upgrade could make such a difference. What could I do next to upgrade? Currently Rega RP3/Elys 2 going into a Rega Fono MM MK3 Phono Stage with the cable that came with the turntable.