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Do we still need 6550 or KT88 tubes?

I would like to learn your opinion and experience with KT120 tubes.

Considering that KT120 match 6550 or KT88 based amp (is a direct replacement), how do you like the sound of KT120?
Do we still need 6550 or KT88 tubes?
Do we still need to pay for NOS power tubes?

BTW at the moment a KT150 tube is announced. Should be even better than KT120 and could be interesting upgrade for current KT120 owners.
milimetr
77jovian
271 posts
 
I'm told the KT120 has a bigger bottle and won't fit in my ARC VT100, so I'll continue using 6550's unless I hear differently. Also use 6550's in my guitar amp.
charles1dad's avatar
charles1dad
6,996 posts
 
I have to agree with Wolf Garcia, the KT120 has been widely used and approved by many. I've not read or heard reports of reliability issues. People seem to be very happy with them.
77jovian
271 posts
 
I'm told the KT120 has a bigger bottle and won't fit in my ARC VT100, so I'll continue using 6550's unless I hear differently. Also use 6550's in my guitar amp.
isochronism
1,447 posts
 
I also agree with Wolf, at LEAST as far as musical amplification goes... headbangers will agree. (mental note to myself: switch your amps past standby)
bifwynne
2,069 posts
 
Concur with positive comments about KT-120. Much more dynamic, open and great bass response. Never had a KT-120 blow accept when brand new, occasionally one or two arc'd and took out a bias resister. But that also happened with Winged "C" 6550s.
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