Quote: Originally Posted by spanimal /img/forum/go_quote.gif I bought the Belkin power filter on YOUR recommendations - for 300 aussie dollars it still is the single most valued investment I have made, bringing clearly audible changes to anything I connected to it. I still don't know why it works but it does, It taught me the term "noise floor" like the HD650 taught me the term "Audiophile" whilst the K701 showed me "detail" and "sound stage". I'm still not entirely certain of the term "pratt" hmmmm. Anyway, thanks mate. I agree "noise floor", "Audiophile", "detail" and "sounstage" make sense, and I can hear, but, "prat" not sure what that is???. Could it refer to instrument seperation, ie a lower noise floor allowing for more detail?