Hydra vs PS Audio vs Equitech

One unit you want to take a closer look at, in addition to the ones you listed, is the Exact Power SP15A, alone or togehter with its balanced brother, the SP15 A. I had the same choice at my time (three or two years ago), and think the EP is superior to the Shunyata and PS Audio, esp. as far as practical considerations - e.g. plugging in power amps, space, and money-performance-ratio are concerned. Take a look at the archives here, and check out their site exactpower.com

I guess I didn't specify in my earlier post, but I use both Exactpower units, the EP-15A (regenerator) and the SP-15A (balanced power unit). Either one can be used alone, but the optimum setup is to use the EP to supply (unbalanced) power to the front end stuff (amps, powered speakers and/or subs) and also to power the SP unit (balanced power) which can then supply all the front end/source stuff. This is what Brent Jackson at Exactpower recommends and I have found it works beautifully.

Gary Dodd from Dodd audio is now making balance power conditioners, I sold my bpt 3.5 sig plus, and bought 2 Dodds, and a power cord for the same $$$. IMHO, they are MUCH better, AND cheaper. I am also waiting for Jim Weil's latest, and greatest Sound Applications linestage.

JMO

Good Luck