C Chesterb New member Joined May 3, 2017 Messages 3 Reaction score 0 May 5, 2017 #1 I am looking at a Mark III blue stripe. The previous owner put KT66's in it. Can this be done by just re-biasing the amp or is there a mod involved?
I am looking at a Mark III blue stripe. The previous owner put KT66's in it. Can this be done by just re-biasing the amp or is there a mod involved?