Genalex Gold Lion KT77
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This tube more than likely will not work in the Defy as pe my tech’s opinion. He did grant approval on the mystery tube as acceptable in the Defy’s circuit. Bombed plant is dead giveaway
btw if someone says **mystery tube has even more midrange vs the 88...** I’ll dismiss.
The 88 is well known as **bloomy** midrange.
Which again, xover type speakers need the 88 to ENRICH that 1800hz-3500hz region.
FR , especially dual concoction/scheme,,has already too much,,well actually with the right tube ina PP, just perfectly rich enough.
a single FR would (might) bore me to death.