KT-88 in Conrad Johnson Premier 11a


I read some discussion about replacing 6550 in Conrad Johnson Premier 11a by KT88 may/will tighten bass and improve overall midrange and treble performance.

I talked with CJ and they said they never tried KT-88 in 11a (well I really doubt it) and it may not be able to bias KT-88 in it at all.

I really would love to try KT-88 in my 11a but I need to make sure I can bias it correctly... Any one got experience in it?

Thanks
Andy
hklai

Showing 2 responses by artmaltman

I used a variety of KT-88 and KT-90 in my Premier 11a and Premier 12's. They were all wonderful, so it is very much a matter of taste.

This is the only line of amps in my experience where I ended up preferring 6550 to KT88 or KT90. Usually I prefer the slight touch of ripeness added by these latter tubes. But CJ gear already sounds sweet with 6550's and the KT88 and KT90 were a little over the top for me by comparison.

But I don't think you can go wrong try ing it out, its a huge part of the fun of the hobby.

Art
Thanks Jburidan. Yes I used the older Svetlana KT-88, which would now be SED brand. The KT-90's were EI from Yugoslavia. I bought these all from Kevin Deal of Upscale Audio, if I recall correctly.
Art