Anyone else regenerating A/C?

Speedy, I'm glad you found the EP a useful addition. I guess there's a limit to what one can expect from dedicated circuits alone, even with the best of power companies? I always shut off my power amp (and put the sub on "standby") before hitting the switch on the EP to turn things off (or on.) All my front end Levinson/Wadia stuff has no power switches anyway, so that's a moot point in my case.

Joey, as far as I can tell, the only substantial change in the PS audio unit is their use of a variable power supply to reduce the heat problem. I question the 85% efficiency figure simply because, if it were so, they'd have made the unit competitive with the 1800 watt capacity of the Exactpower, and apparently they couldn't quite get it there. It has some fun bells and whistles, and features with fancy names, but it still fixes the noise problems with filters, which in my ever so humble opinion, represents a previous technology.
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Speedy,

The Exactpower is a superior product to the PS Audio, and as you say, PS Audio does seem to be all about mass produced profits. You can tell by how they push out new stuff everyday.
I have two EP15As, one in my HT system thats allways on, and the other in a dedicated tube system. They have worked flawlessly. I live in the lightening capital, Florida, so being a little paranoid, I have each one pluged into a audio grade Brick Wall surge protector, which I think IS the best surge protection. The Brick Wall is less than $300 new, so I figure the worse would be that it would be the sacrificial lamb.
But the point is, that even going through the Brick Wall, the EP15a shows no sign of problems or negative change in sound whatsoever.
The stable AC is what sold me on them at first, then the filtering and surge protection is just extra.

In the tube system, I use the one button to power up everything except the amps, which I turn on about 15 seconds after. That way there isn't too much demand on the EP15a reserve before it gets a chance to stabilize.

One other good thing about Exactpower I was told, is that as they improve the models, you can have yours upgraded by them.

Happy listening,

AB.

I am not knocking Exactpower. They make a fine product. But in my system, 1,500 watts is plenty. I think the two units are very competitive and it comes down to personal preference and what you need for your particular system. For me, the Power Plant Premier works great. I especially like the 10 outlets it has on the back of the unit. IMO both units should be auditioned and compared. Also, PS Audio has a 30 day money back guarantee.

What is the difference between the Ultrapure and the SP15 units?

Does the Ultrapure basically just add more levels of filtration over the SP15, in addition to the balanced power?

I have compared the Power Plant Premier to the ExactPower and they basically do the same thing in a different way. They both have low impedance output and reproduce perfect sine waves and have reserve power. IMO it comes down to personal preference. The PPP has 10 outlets and 5 isolated zones. That is what the filters are for so there is no cross contamination of power for each zone. The EP has 8 outlets and is not isolated. The output in watts on the PPP is 1,500 and the output on the EP is 1,650 at 120 volts. It says it clearly on their website. 150 watts is not a big difference. Like I said before, try both units. I prefer the PS Audio PPP.