#1
im planning to change my blackheart's tubes
are JJ-12AX7 and JJ-el34 tubes ok for my blackheart

can i change the tubes by myself or do i need an amp tech to do it???
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#2
I put a Tung-sol pre and a JJ el-84 in mine and it was much better than the stock ones. You can do it yourself no problem, just pull em out and stick the new ones in. I dont know about the el-34 though.......
Epi Les Paul-APH1/Mean 90
MIM Strat

Korg DTR1000
ADA MP-1
Mesa/Boogie Quad Pre
Mesa/Boogie Midi Matrix
<power amp>

Quote by rhcp_freak
If you're EQ'd loose, you'll sound loose anyway.
#4
You can't use an EL34 in there. The EL84 is a noval tube, 9 pins. The EL34 is an octal tube, 8 pins. Won't work without modifications.