Oh my gosh!! I don't do a lot of tube rolling. My hearing is just not that detailed I guess. But I did recently try a couple things in my Cayin TA-30 (mods by Paul G.). Other than the standard tubes he provides in the unit, I tried SED Winged C and just the other day put in Siemen's NOS EL34's. Honest to God, these Siemen's tubes are blowing my socks off. Previously the unit really lacked punch at lower volume levels. These Siemen's tubes have turned the Cayin into a whole new amplifier. Really.
EL34 differences in air & stage depth?
I've been searching the threads trying to learn about differences between different EL34 tube offerings. Most comments seem directed at tonal qualities. I'm curious if any have compared and found differences in "air" and stage depth. My system is posted. The H-1 appears to come with Shuguang EL34s. It does many things well but I'd like a little more openess in the presentation. Possibly this means more mid-range forwardness and/or greater high end extension. Thinking about "tube rolling" (KT77s as well as EL34s). Any suggestions would be very much appreciated. Thanks in advance for your input.