I use Cary WE300B SE monoblocks to power the Duos and I love them both. Clarity, lushness, dynamics etc. Everyone including the Audiopax/Avantgarde dealer has loved this combination at my house. I also have a good listening room. In fact, the Avantgarde dealer told me that Jim Simth and several others have audio set-ups similar to mine. The Cary's with WE300B with Mullard CV 378 and NOS 6sn7s are a special combination. Denis Had may help you locate a dealer who will lend you some amps to try out if you e-mail him.
FYI, I have found the silver speaker wires and interconnects are very complimentary in this set-up. I was told this by another Avantgarde owner, and he was correct in my opinion.
FYI, I have found the silver speaker wires and interconnects are very complimentary in this set-up. I was told this by another Avantgarde owner, and he was correct in my opinion.