I had Gold lion kt88s in my Rogue Audio m180s, and over time four of them blew up in my amp, one time so bad it took part of my circuit board with it. I liked the sound but will never put these in my amps again. I also ran my amps with Gold lion kt77s without problems, and use Gold lion 12au7s with good results. I dont know if my Rogues drive the tubes harder than the Mac gear, hence the high failure rate.
