I had 300b mono blocks MB25 iconaudio that sounded amazing and now replaced these with Hegel H70. The sound is superb !!! though the higher amp, Hegel H100, sounded weird... There is some kind of a matching issue that the virgos are sensitive to and it seems to me that they perform at best with low power amps that are capable providing high current... But this is just my guess so don't criticize me if I am wrong :) but I would like to hear if somebody had also such experience