Hi folks.So I took my mark IIB out to gig yesterday as I have been really enjoying it at home but the problems with this amp continue.I had my volume 1 at 8-9 and the master at 2-3 but I had to have the lead master way up at 7-8 to have it around the same level as the clean channel.What could cause this?I also get the feeling that the amp isn't as loud as it should be as with the master at 2-3 it wasn't really really loud and from all accounts these amps are loud?? It's been serviced and recapped/retubed but there's something going on with it.