Examples of the JB sounding heavy?

[Sam SG]

12at7 is 40% gain factor vs the stock 12ax7 being 100%
12at7 also draws a higher current which Im sure loads the circuit harder and has its effect too.

 

[AdrianSD]

12at7 is 40% gain factor vs the stock 12ax7 being 100%
12at7 also draws a higher current which Im sure loads the circuit harder and has its effect too.

Thanks for that. Time will tell, no way the 12ax7 goes back in that socket anytime soon

 

[Coma]

As @Rex_Rocker wrote, reduces the gain and takes the fizz out, it sounds punchier and more defined. It "feels" warmer now, but I have no evidence other than my own perception. I did the same V1 replacement in the DSL40CR with similar results. I can now use the whole gain range on the 40CR OD1 channel and the 5150 just punches harder as I turn up the gain past 6 on the blue channel, rather than turning into a fizzy mess.

I gotta try that! I got the 50W Stealth about half a year ago and the one thing that really irks me is how the gain goes from zero to infinity up til noon and then the rest of the knob range does absolutely fuck all.

 

[jeremy]

i thought it was:

12ax7 100
5751 70
12at7 60
12ay7 45
12au7 20