I auditioned the Duos a few weeks ago. The dealer (who is VERY good) had them set up in the corners as Twl suggests. In this configuration, I found the imaging distinctly sub-par for this class of speakers. Not that it was "bad", but it was obvious from 30 seconds that the other stuff he had (Avalon, Sonus Faber, ProAc are the ones I can remember) was imaging a LOT better. I found the bass to be somewhat light, but not as obviously "missing" as, say Magnepan 3.6's.
But personally, I didn't care for them primarily because they are REALLY immediate. 5th row set? No way! You are on stage with these AvantGardes! I found this to be too immediate and, I guess I would describe it as exhausting.
But personally, I didn't care for them primarily because they are REALLY immediate. 5th row set? No way! You are on stage with these AvantGardes! I found this to be too immediate and, I guess I would describe it as exhausting.