I have a pair of G501's and a pair of G350's and use Manley Neo-Classic 250 monoblocks. After going through several different amplifiers, including Tube and Solid State designs, I have found the Manley amps to be the best in my experience with these speakers. The Manleys offer selectable triode or tetrode modes. Most of my listening is with the 100W triode mode but some large scale music (big band or orchestral) needs the full 250W treatment in tetrode mode.
