I used 2 Quintets before switching to the PPP, now use one on my HT. They are quite good: HIFICRITIC found the Quintet better than the Duet. Not only improved the sound but also inproves the picture on my plasma tv.
PS audio Ultimate outlet or Quintet?
I've been using UO and UPC 200, both use baluns for conditioning. They both work great but I have limited experience in power conditioners. I use MAC sound pipes for cables. Are the duets and quintets "better" products, or simply different-- is it worth upgrading?