To answer the origonal question about amps. I use mine with a Karan K180 and Viva Solista SET tube amp. THe K180 at 180 watts of SS power, sounds goood, very good even, but the Solistas 22 watts are much better. There is more dynamics, base grip, they even make the speaker sound louder. When I bought mine, the distributor suggested 20 watts as a minimum for tube output, if you wanted to hear complex symphonic music to full effect
