I hane my GPs hooked up to an antique Nak CA7A for preamp and a Nak PA5ii for power amp (150wpc). They are the best speakers I have owned bar none (including my Klpschhorns, Mordaunt-Shorts, Martin Logans and Magneplanars). Thay are so cheap for what you get, its like buying a Ferrari for Toyota pricing. You simply cannot go wrong with SF GPs or Cremonas.