Ok forgive me since I'm a newb to all this valve techy stuff but I just bought an ashton vp50 combo not the worlds best amp but I liked the sound in the shop and looks pretty rugged so for £200 I went for it. I noticed in the manual it claims to have 12ax7's in the preamp upon closer inspection it seems to have a 12at7 in the V2 position when I searched the net I noticed lots of other shops selling this amp said the same that it was 12ax7+12at7. I was just wondering why this might have been changed? Would I be able to just swap the at7 with an ax7 without biasing and would this have much of an impact on the sound quality/volumes?
any help would be great
any help would be great