alper_yilmaz
|
Dear Guillaume,
I have been using KT120's on my Copland push/pull amp instead of 6550's and they are spectacular output tubes with very tight bass, open up top and very airy. They definitely contribute to the soundstage and they are more detailed than most other other tubes I have heard. Among all the output tubes I have listened to so far, KT120's and KT150's are my favorite ones (I might add a nice SV83 to this list!).
Almost a year ago, I wanted to use a pair of KT120's on my SE34I.2+, yet Steve mentioned to me that the SE34 cannot bias KT120's appropriately so they would not perform properly. Even if the tube could be used as a substitute for an EL34 (I am not sure if it could be), it needs to be biased according to the tube specs, and some self-biasing amps designed around one type of tube might not do the merit to the other tube. My Copland is not self-biasing and also it accepts the KT120's in place of the 6550's or KT88's which the amp was originally designed around. With the proper bias setup at 0.45 V, KT120's sound fantastic!
In this case, my advice would be to talk to Steve first before investing in a set of KT120's...
Best,
Alper
|