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!
128x128zavato

Showing 1 response by polk432

Stevecham is spot on. I spoke with Dennis Had before he retired and he said he likes to run the Cary CAD120's amp at 160mV (t - 10) the manual calls for 140mV (+ - 10) I run mine at 150mV and it works fine. I run 8 KT88's and 4 6sn7's. If your bias is spot on you should be happy with the results. Keep a second set of KT90's on hand. Happy listening.