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Clean power is key 
Absolutely; silence at high-gain has been the enemy that I keep closest

I would love to try some of Paul McGowan's AC regens ($$$), but for now have a few sets of APC voltage regulators, Emotiva CMX-2 DC filters and Topaz/Xentek/MGE transformers in series for the main system, computer and subwoofers. Digital is on separate transformer to keep everything inky-black
