I have to agree with Zieman. If you've ever tried a power conditioner on a Krell product, or most other over-engineered solid state products,most of the time they are of little use. Every rule has its exception, but when you're finding a dramatic difference with a power conditioner, you may simply have a device in your circuit that interacts with your audio system in a harmfull way. One of the most cost effective ways to eliminate noise in your system could be to run a dedicated power circuit to your audio system. There are other things to consider as well. I have noticed a dramatic difference in clarity when I turn my sat receiver and my wireless router off. These devices are not on the same circuit, but produce copius amounts of RF. Having said that, I do use a conditioner on my front end. I chose a Tice power conditioner to protect my gear from electrical anomolies and it does improve the sound to some degree but it isn't a mindblowing difference. From my expereince, whether or not you believe in tices TPT technology, they are still fine products. The other nice thing about tice is that no one really remembers the company since it went bankrupt 10 years ago and you can pick up a really nice isolated multi circuit power conditioner fairly inexpensively.
I hope I could help
Maplin
I hope I could help
Maplin