Hi Tom, good to see your post! One thing folks should be aware of about the A-S amps is that the choice of 6SN7 driver tubes will make a big difference in the sound. In the MA-2s you heard at my house on the standard Eidolon, Tom, we were listening to Sylvania 6SN7-GTA tubes manufactured in the '60s. These have a very clean, detailed and somewhat airy top end. Put in something like RCA grey glass and the top will get much softer and sweeter. Do you know what 6SN7 tubes were being used in the MA-2s you listened to on the Diamonds?
Warm regards my friend,
Warm regards my friend,