I have the newer 3502 model that takes EL34 as well as 6550 types. Like someone said, one tube type is not necessarily better than the other, just different. The amp does have more bass heft with the Svetlana 6550 than the new production EL34 and EH 6ca7 tubes I tried. One exception is the JJ 6CA7. This is a sweet tube! Refined and warm with plenty of bass.
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.