SOOO I just ordered 6 pairs of JJ 6l6GCs from tube depot for my mesa 400+ as it still has the original tubes in it from the 90s and one blew during my last show (surprise). ANYWAYS it turns out I will be going into a really bad ass studio to record with my band and I really want to use this amp.
Now I know I should do the bias mod before I put the JJ's in (I bout the kit already) but I just don't have time to take it to a tech and get it all biased up before the session.
SOO pretty much what I'm asking here is will putting teh JJs in and playing with them for just this session ruin the amp/tubes? or will the amp just not run as efficiently as it could? Like I said, it would be JUST for this session. After I'm done I will get the mod installed and the amp biased properly.