killertone
Well-known member
Just bought a 2004 Herbert. I am a Diezel noob. What I am wondering is:
Are there different revisions of this amp?
If so, what are the differences?
Can the 2004 take different output tubes like the recent Herberts?
What years were the ones with the external bias test points?
Thanks!
Are there different revisions of this amp?
If so, what are the differences?
Can the 2004 take different output tubes like the recent Herberts?
What years were the ones with the external bias test points?
Thanks!