"The PA-7 was a nice jump up from my old Adcom GFA-555ii’s "
I am wondering what preamp you were using with your GFA 555II amp??If it was one of Adcoms (even the GFP 565) then I see why you may think that PA7 was a lot better?? I have used a very special (not expensive) pre amp a fully tubed Modwright SWL 9.0 and I have to say the two together was magic driving a pair of original UK made EPOS ES22’s these of course had to be Tri-wired with Audioquest crystal cable. Beautiful highs and detail with excellent bass and great tone, really made me understand how nice this ADCOM amp really is.
I am wondering what preamp you were using with your GFA 555II amp??If it was one of Adcoms (even the GFP 565) then I see why you may think that PA7 was a lot better?? I have used a very special (not expensive) pre amp a fully tubed Modwright SWL 9.0 and I have to say the two together was magic driving a pair of original UK made EPOS ES22’s these of course had to be Tri-wired with Audioquest crystal cable. Beautiful highs and detail with excellent bass and great tone, really made me understand how nice this ADCOM amp really is.