I owned the Duos for about 3 years and I thought they far and away sounded best with the Audiopax 88 mono amps. I owned the BAT VK150SEs and used them on the Duos which to my ear was not a great combo, but I guess others disagree since they did show with them on the Trios a few years back, but then I didn't like the sound of that system either. One nice thing about the Audiopax amps is that the tubes are cheap and the sound warms up really quick.
Amplifier for Avantgarde Duos
I'm looking for an amplifier for my Avantgarde Duos. I'm currently using an Art Audio Carissa with an ASL Flora for the pre. With this combination I still get a shrill presentation on some recordings. My pre has a nice rounded top end so I feel comfortable with it. Does anyone have any suggestions for the amp. Again I prefer something that softens the shrillness. Some amps have a lean top end. The Carissa is almost there.