Dan,
I've been into these things for years. My buddy Mike VansEvers (
www.vansevers.com) has been making them and other power conditioning types of items for more than a decade. Some in the audio community consider him a genius and others a lunatic, but there is a pretty remarkable difference using his stuff. I was pretty dubious at first, but I dragged an old Marshall amp over to his place and did the A/B test. Final result: I left his shop about $700.00 poorer.
I power my rack and other essentials with his stuff, but so far not my monitors. I don't know why that didn't occur to me earlier. Dammit...thanks to you I gotta go spend more money
