I had a PS-Audio P-500,which "failed"(broke)after three weeks.PS-Audio,then could not find it,when I sent it back to them,and made me have UPS do a check.It was misplaced by PS Audio.They were nice enough to send me a new unit,which literally burnt out(and I have good dedicated lines,btw)in 6 days.I had enough of that,and got a full refund from my dealer(a class act....Galen Carol Audio).Yet,PS-Audio got upset,and blamed the failure on my lines.NO WAY!!I had an electrician check out what I already knew.My lines were perfect(I live in the suburbs,and have a dedicated room,btw).I even had a 10 dollar radio plugged into that outlet,and it plays just fine.
To me,I would not EVER touch another PS-Audio "active" product.Just the fact that they told me to call UPS,to track a product that they had in their facility,for over a week,without knowing it,tells me they don't have good customer support.
On top of it all,the PS-Audio Power plants run HOT.My friends who own power plants have heat issues as well.I know the new one is suppoded to run cooler,but I believe that is now made in China.Not necessarily bad,but it tells me that PS-Audio is all about profits.
The Exact Power stuff(see the web-site,and every claim made on that site is absolutely true)is FAR better made.Beautiful casings,and attention to detail.Most important,they work extremely well,and do EVERYTHING the mfgr claims.AND RUN ABSOLUTELY COOL.NO heat issues!
Truthfully,The combination of the Exact Power EP-15A/Ultrapure units has taken my system to a level I could not have imagined.I have been a hobbyist for over three decades,but this business of line noise,and "balanced A/C",is something that does not get enough attention.Or is still misunderstood,by many.Including me!
The investment is worth every penny,IMO!
BTW,the tech rep of Balanced POwer is INCREDIBLY knowledgeable,and helpfulHe is NOT a "sales" orientd person,but more inclined to be an "educator"!His name is Quan,and he has greatly enhanced my musical enjoyment,with his insights!
Best to all.