Quote: Dear wyki, many thanks for your comments! I played with OTLs (Futtermans, circlotrons gblah) many moons ago, my it's been twenty years now... I was never really happy with them. Sonically, I really love Single-Ended Triodes above all else (directly heated or otherwise, who cares)...

Hello! I've been toying with the idea of designing-come-making a triode amp to drive my HD560s; I was thinking of playing with 6G-A4s, 2A3s, 6AS7s and maybe a 45. Has anyone found what actually makes these headphones tick? Are they happy with a high-impedance drive (i.e. low damping factor)...