In response to the issue of amps, I have the 9's and started with one Classe CA-150 which was great. Then, I bought a used preamp on audiogon and spoke with the seller and he recommended two CA-150's to drive as monoblocks. I have two now and heartily recommend the increase in power. The entire range is improved with the mono's. I also have a preamp that is from CJ and the combo of tubes and solid state is an improvement to my tastes. Hope this helps. Steve
