do tube pres need biasing

stringking

New member
I just had a question if anyone knew if a tube pre needs biasing and balancing upon tube replacement ,like tube guitar amps do ,i just got a tl audio pa-2001 and was thinking of retubing it , if anyone could help i would appreciate it.
 
The only biasing that I've ever seen done is in the power section of a tube amp. The pre section does not. So I'm guessing a tube pre does not require it either.
 
Scottgman said:
Biasing only refers to power tubes. There shouldn't be an power tubes in a mic preamp.

Sort of. All tubes need to be biased. Preamp tubes just always use cathode bias, which is self-adjusting.
 
Back
Top