I have a Decware that runs the EL34, a pentode tube, in triode. The sound is unbelievably sweet and wonderful. With the amp I have the ability to tube roll and tried some KT-88's. The KT-88 totally changed the sound and made it sound too bright, too sterile and the musicality went away. Look forward to trying other tubes to see what, if any, sound better. I also have a Dynaco ST-70, also running the EL34 in ultra linear. I love the sound of this amp as well but if I listen to the EL34 in SET triode and then listen to the Dynaco, the Dynaco then sounds very mushy. Some may disagree but to me it sounds like Polk speakers, which to me are pure nasty.
