Thick and solid with deep and powerful bass
I have Audioromy 838 with 845 tubes driven by 6n23p and 12au7. I modified the circuit with 12AX7 and EL84 with 6L6GC as cathode follower works together to swing more than 200Vpp and 22mA current to fire the 845 grid. After modification, the sound much better and I was using all EH tubes. The top is a bit sharp and the low is not deep. The mid are okay. I read many review about JJ and today I replace the EL84 and 6L6GC from EH to JJ. WOW! That is only I can say after I turn on the amplifier and play my favorite music. The sound is totally different. It is very thick and alive. Powerful and deep bass. Clear top but not edges and not sharp. When I push them hard, they really sing! I extremely happy with JJ.