william vogel
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- Dec 18, 2016
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In theory they should last about twice as long because they have the ability to make twice the power if run at their ability. In reality, I can’t tell you. I build amps and I sell them. I’ve had power tube failures early in their life (<1 hour) but I’ve never worn out a single power tube. I think you’ll be able to get many hours of playing and much longer life than EL34’s. I have the Sino brand Chinese KT88’s in my amp right now. I’ve used the Gold Lions in a DR103 build and the Sino again in a Super Bass build. Both those amps belong to the same customer in Texas and they are 2 years old and still running strong.Do KT88s last longer than EL34s? I ask since they cost about $130 for a pair without shipping