I had the opportunity to try the Welborne 300B with my Duos and it is a gross mismatch. I have tried everything from 45,2A3,50,300B, and found the 300B based amp using WE tubes. The Chinese TJ, Valve Art is not worth it.
I then read further that the best match for the AG is the Audiopax 88. Right now I am using the Hovland Sapphire as my main amp with great success. It brought bigger dynamics than the lesser powered SETs but my heart still tells me to go SET.
In this respect has anyone ever tried the BAT VK60 or 75???
I am very curious as I have a gut feel this is the perfect amp for the Duos.
Please share!