jackthehack said:What is your amp doing that makes you think it needs new tubes? easiest route to go if it needs them is simply to buy a matched replacement set from GrooveTubes/JJ/etc.
jackthehack said:Never pay ANY attention to anything said by a moron at GC. If you replace the tubes with a like matched set there should be no need to rebias the amp. If you don't have any experience, you're better off paying someone to do that, voltages feeding 5881's can kill you quite dead.