Problems with Svetlana KT88 and Sonic Frontiers

Nameci is right. Sonic Frontiers told me the earlier Svetlana KT88s had stability problems. ARC and other manufacturers will tell you the same. Present production Svetlanas are supposedly better, but some tube experts believe they are NOT the most reliable tube, period.

I have used EH6550s, which look just like KT88s, kind of a hybrid tube. They sound excellent in the Power 2 amp, better than anything else. They add more life and detail to the highs, and have a great lower end punch.

Has anyone tried the Electro-Harmonix KT-88 in the Power 2? If so, what did you find? Here's a review of various tubes and the reviewer prefers the EH KT-88 to the Svetlana KT-88. Different amp but wondering if I would get similar results in the P2.

I have been running Svetlana KT88's in my power 3's with no problems. I am interested though in trying the EH6550's. I would be interested in hearing from anyone that has done a direct comparison of these tubes on power 3's.