KT 88 with Leben cs 600

The KT88 is not a very good sounding tube relative to the other tubes your Leben can take looking at that chart the KT88 and 6550 are the worst of the bunch.

Jond,

i agree with you. Most KT88 amps have a hard, brittle sound that I don’t like and the holds for 6550.  Of the tube types listed, I particularly like the 350B (real Western Electric, very expensive), and 6L6 and KT 66 are also very good.

Have you all had any experience with the KT77 tubes?

How is their sound in comparison to the EL 34 and KT 66?

Thanks,

Mike

The 600x ships with el34’s or 5881’s. I prefer these two varietals. Ive listened to kt77’s and some prefer them…