I have used a Panamax for years.When I first put in the Panamax the noise floor dropped considerably.That was when I lived in a big city and apparently it was filtering out a lot of grunge in the power line.Auditioned a Power Plant which caused all of the transformers to buzz.Now I'm in the boonies and the cdp and pre sound very slightly better with no conditioning,but I keep it in for surge protection.I also have the amps hooked up to a Tripp Lite surge protector,and find no audible difference when they are plugged directly to the outlet.I do have them on dedicated lines.And yes,you do have a really nice system!