I use a Audio Research D400mkII (400wpc/4ohm) solid state amplifier that I purchased used on A'gon for around 2K. This amp give me the best of both worlds smooth, airy and guts!!! This is a great amp I feel for any speaker that need lots of current. I've thought about buying another to run mono. Truly the greatest speaker I've owned...
Good Luck...David
Good Luck...David