I will say I personally very much dislike the 6550 tube from past experiences. I am a bit EL34 fan and find a nice balance in that tube of SET-esque richness and modern linearity. Particularly for me the Gold Lion KT77 variant has been a tremendous find and is my power tube of choice for my EL34 amp. Also I agree with sfall above circuit matters a lot my amp is triode wired and class A which is why I find it so rewarding.
KT-88 vs. EL34
Hi. I have a modified Jolida 502 amp (not my main amp) currently using KT-88s and formerly the similar 6550s. Some have suggested that this unit will sound even better, power hit aside, modifying to accept EL-34s. The mod is easy. Anyone find this to be true or is it just another myth? Thanks in advance, Andy8400.