I am not sure of the power requirements of the Concertino relative to the Grand Piano. For the Grand Piano I first used a Densen Beat B-100 (I think 100 watts) and that was not enough power. I switched to an ARC VT-100 MkII and never thought I lacked power, though I probably could have used more. However, the VT100MkII and the Grand Piano sounded pretty good together. I did not use any other amps with the Grand Piano. The Grand Piano sounded more true in the upper mass and lower midrange.
One caveat is that I did not do a side by side comparison with these speakers in the same room with same electronics but in different rooms and with different electronics.
One other caveat on the Grand Piano is I have only used them with the stone isolation bases. I never used them without the bases but would not be surprised if the bases materially improve the sound.
Hope this helps.
One caveat is that I did not do a side by side comparison with these speakers in the same room with same electronics but in different rooms and with different electronics.
One other caveat on the Grand Piano is I have only used them with the stone isolation bases. I never used them without the bases but would not be surprised if the bases materially improve the sound.
Hope this helps.