Have used various Maggies since 1984, WARNING!, once you live with planar drivers- NO cone speaker will ever satisfy! Recommend high current amps from Threshold, Bryston, Classe, Krell. These speakers love strong transistor amps and since they are fuse protected you can crank till the fuses blow! Remember to keep the fuse ratings and types as Magnepan designates. THE MAGNEPAN TRUE RIBBON TWEETER IS THE FINEST HIGH FREQUENCY DRIVER IN THE WORLD! ENJOY!