Now that is a tough queston. In theory it makes sence because now you have a dedicated powersupply for your amp, and a dedicated power supply for your pre / pro with out the added baggage of amplifiers in the same box as your pre / pro. But there are always exceptions to the rule and I have never tested this, I went straight from an AVR to separates. Did it sound better, sure, will my $2000 Rotel pre / pro get barried with me at my funeral, it will if my wife has anything to say about it.

Keep in mind also that it isn't cheap and for most people the imporvment in sound quality isn't worth the thousands of dollars spent to go this route. We are now entering the law of diminishing returns. Spend huge amounts more, and get very little improvment in sound quality.

paul

Axiom M80, VP180, Qs8, EP500
Epson 3020
Rotel RB-880
Denon AVR-990