I don't own stock in TrippLite or anything They make stuff that's as good as anyting out there, and costs what it should. Keep in mind that if your AC has a high level of harmonic distortion (the average is about 3% THD) _nothing_ short of local re-generation is going to clean it up. No filter will do it...nada. RF can be filtered out, and to some degree EMI can be also filtered, but it's gets harder as the frequency of the pollution goes down into the audio band. It is _extremely_ rare for EMI to get this bad unless you share a power transformer with a foundry or something like that. Truthfully, pedestrian things like the acoustics of your listening room have a much greater impact on what you hear than anything in the 'tweak' realm. Anyway, I see I am ranting, and should go to bed

[This message has been edited by soundhound (edited December 24, 2002).]