Actually, here are the most notable ones I have heard over the years at dealers:
-Magnepan (SS amp) at Audition Audio in Birmingham AL (~1987)
-Dynaudio (SS amp) at now defunct dealer in Ownings Mills MD (~1993)
-Martin Logan/Focal (Krell SS amp) at Tweeter, OWings Mills MD (~2008)
-Magico (VAC tube amp) at Sound By Singer, New York City (smallest room) (~2010)
-mbl (mbl SS amp)at United Home Audio, Annapolis Junction MD (~2010)
- PSB (ARC tube amp) at Listening Room, Pikesville MD (~2010)
- YG Acoustics and Magico (unknown amp) at Capital Audiofest (~2011)
-Magnepan (SS amp) at Audition Audio in Birmingham AL (~1987)
-Dynaudio (SS amp) at now defunct dealer in Ownings Mills MD (~1993)
-Martin Logan/Focal (Krell SS amp) at Tweeter, OWings Mills MD (~2008)
-Magico (VAC tube amp) at Sound By Singer, New York City (smallest room) (~2010)
-mbl (mbl SS amp)at United Home Audio, Annapolis Junction MD (~2010)
- PSB (ARC tube amp) at Listening Room, Pikesville MD (~2010)
- YG Acoustics and Magico (unknown amp) at Capital Audiofest (~2011)