KT-77 vs. KT-66


As I've had my QS Mono 60s, I've tried a variety of tubes. I have sold off my KT 150s, and use KT-88s from time to time, but what I really love are KT77's.

I'm thinking of getting some KT66s, thinking that lower powered tubes are better (to my ears) matches for my system. I just don't know what the KT-66's sound like. 

Question: If you have compared KT77 and KT66 tubes, what would you say the sonic, audible characters of each are? Is there a difference you can hear? What does the KT66 sound like -- to you?

128x128hilde45

Showing 3 responses by jond

KT66 and KT77 are both great tubes as @jjss49 states above the 66 will sound more classically tubey and a bit warmer but they sound great to my ears. Worth exploring since it's an option for you @hilde45 

@hilde45 If you can't use 6L6 or EL34 tubes it's likely you can't use KT66 or 77s either as they are each very similar to a 6L6 and EL34 tube respectively.

@hilde45 I am still a bit baffled by this he says not to use EL34s but you can use KT66 and 6L6 but also KT88s and KT150s?