Tube amp bias


I've got a Rogue Tempest II Magun, which sports 4 KT90 output tubes. Bias is spot on per manufacturer spec.

I have read about people running higher bias. What will running higher bias do? I assume there are pros and cons. Will tubes life shorten? Will the sound be somehow different?

What's been your experience?

Thanks in advance!
zavato

Showing 1 response by stevecham

I have tried this and my experience is that you don't really gain anything beyond
increased noise and shortening the life of the tubes. Audio amps are not guitar
amps, where such an increase in the bias can provide nice distortion. My sense
is that the manufacturer knows best what the optimal operating parameters are
for their products. Stick to the bias recommended by the manufacturer.