thegaindeli
Well-Known Member
Just replaced the awful sounding JJ's 12AX7 tubes from my 1959RR... WHAT A DIFFERENCE!!!
I personally think JJ's 12AX7's are some of the worst preamp tubes ever made! IMO they're just to stiff,and lack acoustical dynamics.Even without my TS9 turned on,the amp would feedback like crazy! I had my volume I at maximum,and my volume II at 2:00 o'clock.I'm always plugged into my THD,and play at the 12db setting.I pulled the JJ's and replaced them with 2 original Mullards,and a 5751 tube at the PI(or V3 position).NO MORE FEEDBACK! This Improved drive,tone,picking dynamics,and improved focus 10 fold! It was sounding kind of harsh,and the feedback was quite annoying.I can switch over to a 12AX7 at the PI to increase my power-tube drive intensity if I want.At least that's how my ears perceive it anyway? I pulled the JJ's out of my Guytron,and have experienced the same improvements their also.
I personally think JJ's 12AX7's are some of the worst preamp tubes ever made! IMO they're just to stiff,and lack acoustical dynamics.Even without my TS9 turned on,the amp would feedback like crazy! I had my volume I at maximum,and my volume II at 2:00 o'clock.I'm always plugged into my THD,and play at the 12db setting.I pulled the JJ's and replaced them with 2 original Mullards,and a 5751 tube at the PI(or V3 position).NO MORE FEEDBACK! This Improved drive,tone,picking dynamics,and improved focus 10 fold! It was sounding kind of harsh,and the feedback was quite annoying.I can switch over to a 12AX7 at the PI to increase my power-tube drive intensity if I want.At least that's how my ears perceive it anyway? I pulled the JJ's out of my Guytron,and have experienced the same improvements their also.