S
Seahawk2982
Member
My 20th Shiva is due for a retube and thinking of trying out a set of 6550s since they are a direct swap. I have no issues with the KT88s but figured I'd try something different and I don't want to modify the amp for EL34s at this time. Has anybody done this and what have your experiences been with them in the 20th? Both on the OD and cleans. Thanks!
Dave
Dave