Tonib; No problem - here's my experience with Cary 805 and AG. Let me start by saying that I have spend almost a year auditioning many different amps in the search for the sound that i want. There were many great amps but in one or more areas they didn't quite perform at the level i wanted. For me the Cary 805 combines the best from many of the different amps I tried into one; musicality, intimacy, presence, size of performers and instruments, dynamics, harmonic presentation, level of detail, drive and control. Some of the amps I tried lost control when the music got complex and the sound level was high even though AGs should be a piece of cake to drive. And only one other amp made my Duo's play bass like the Cary 805! I had to change the input tube before the bass fell into place (mine is the 805C mkII that uses 6SL7 not the 6SN7 used in 805AE so I don't know if you need to do it here as well). When it comes to noise it's 100% silent. If it makes noise it's either the tubes or the pre-amp. The amps I have tried are these; Ancient Audio Single Six, Border Patrol SE300B, Cary CAD300B, Cary SLI80 Signature, Cary 805, DOXA 61, EAR 8L6, EAR 861, EAR 890, Leben CS600, Pass Labs XA30.5, T+A V10 v1 and VTL ST85. Hope this helps :-)