Ah, shut up ya wussie. Go plug in and jam! :laugh2: :laugh2: :laugh2:
I just replaced my tubes this year in my Mesa Boogie ... 28 years. I play a lot ... had no idea that you might need to replace them more often. Then I broke one ... retubed the power tubes ... sounded the same (whew ... I was worried). Retubed the preamp tubes ... put the old V2 12AX7 and V2 12AT7 back in ... they sounded better. Go figure. Unusual I know but true.
preamp tubes should last for a long time. power tubes can too but its much more dependant on how hard you run them