Hello,
I've had my MkIII for about 5 years and have tried Telefunken,Mullard,Amperex,etc. I finally called ARC and got some of their stock tubes for the preamp, the Sovtek 6922. I use them with their tube dampers and to me the preamp has never sounded better. I'd suggest that you call ARC, tell them what equipment you have, the type of sound you're looking for, and they'll be able to help you. New tubes from them are about $25-$30. Another source for tubes and info is Upscale Audio.
Good listening.
I've had my MkIII for about 5 years and have tried Telefunken,Mullard,Amperex,etc. I finally called ARC and got some of their stock tubes for the preamp, the Sovtek 6922. I use them with their tube dampers and to me the preamp has never sounded better. I'd suggest that you call ARC, tell them what equipment you have, the type of sound you're looking for, and they'll be able to help you. New tubes from them are about $25-$30. Another source for tubes and info is Upscale Audio.
Good listening.