Exactpower Ep15a or PS-Audio p500

The Exactpower EP-15A has three times the capacity of the P500 and is a TRUE regenerator. It makes virtually no heat because unlike all other similar units, it doesn't "throw away" the entire incoming power, but "fixes" only the part(s) that are irregular. I can't recommend it highly enough. Exactpower also makes a (separate) balanced power unit the SP-15A, but from the look of your system, I don't see that you would benefit much from that capability anyway.

You should read about it in detail on their website:

www.exactpower.com
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Cytocyle -- point taken. The result however is the same as a unit that regenerates ALL the AC it provides, but with much less power loss (and heat). So I guess technically, it should be called a "power correction" device. For me, the charm is that it doesn't throw the baby out with the bathwater, which allows it to provide high capacity and high efficiency at the same time.

The other thing I like about the Exactpower concept is the fact that it "fixes" those parts of the power cycle it identifies as carrying noise and other artifacts, without the use of the sonics-robbing methods employed in conventional power "conditioners." I just think the use of an efficient Class D switching amp with a feedforward comparison circuit a brilliant solution. So far, I can't find any negatives.
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Zaikes, I echo everything you said (and vice versa ;--) including power amp sounding even better through the EP.

I also wanted to mention a good reason to have the regenrator and balanced power unit as separates: The regenerator can/should go near the amp(s), powered speakers(Logans in my case) and powered sub(s). A BP device is useful near the source equipment, which may (probably) not be near the speaker/amp end of things, and will probably not need to be the same (high) capacity as the regenerator device. In fact I run a 15 foot 10AWG umbilical from my EP-15A over to the balanced SP-15A near my front end stuff. The whole system is "as quiet as a chair!"
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Zaikesman, I said pretty much what you did (about the new PS) on another thread. It has a lot of bells and whistles and features with fancy names, but only the variable power supply is really new. Still handles noise with filters and inductors -- old technology IMO. I think powere amps do benefit from the EP-15A but I do not think they benefit much from balanced power. I save that just for front end stuff.
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Zaikesman, I think with power amps, the most important issue is the AC energy transfer. Obviously a good 10AWG PC is a plus, as well as good available AC. With balanced power units, I think the essential feature is common mode noise rejection, especially important for preamps, phono, etc., but not quite such a necessity for power amps IMO anyway. Plus of course, the size of the required transformer would be pretty large as you already mentioned.

In my reading of various threads/posts, most folks always concluded their amps sounded best plugged right into the wall, but that was usually compared with they're using some kind of conditioner. The only device which seemed not to limit t5he dynamics of a power amp was the use of BIG isolation transformers, which many people like Albert Porter seem to favor.

I did an A-B plugging my Levinson 23.5 into the EP-15A vs. the wall, (both on a ded.ct.) and couldn't really tell a big difference, so went with the EP; but I wouldn't plug a power amp into anything else (other than the wall ;--)

Now I'm using a new McIntosh MC275 Mk IV (tubes! oh Boy) which doesn't draw that many watts. Maybe I'll feed it some balanced power and see what it does?
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