I'm using the Sovtek KT-88s in my Music Reference RM-9 amp with great results. It beats generic Chinese 6550s and EL-34s by a mile. I've had them for five months with no problems. The Svetlana's have a great reputation in the high end and I'd like to try them. I hope this is just a single isolated bad batch.
Problems with Svetlana KT88 and Sonic Frontiers
I've heard that Sonic Frontiers has experienced problems with the Svetlana KT88 in their Power series of amplifiers. SF claims that it was due to a bad batch of tubes, and has switched to the Sovtek KT88. I would like to try the Svetlana KT88, but I am now reluctant to do so. Has anyone tried the SVKT88 in his or her Power series amplifier? What has been your experience? Thanks.