RJ, I am currently enjoying the new Jadis JA30mk2 mono blocks. These amps use the KT150’s.
I am a little surprised that you thought the KT150’s in the ARC Ref 150 SE were in any way disjointed sounding? I have never heard these tubes sound that way in any gear that I have listened to that was designed with these tubes in mind.
Listening to the ARC ref amps on a SF Aida is a great way to stress the wallet to the max. Great combo! No wonder dealer wants you to come in and have a listen, lol.
Hey Davey,
OK, the Jadis is a very nice amp indeed! That must be one special sound.
No, seems like there's some confusion in my last post...
What I meant was-
1. For those trying to tube roll between 6550, KT120 & KT150, not very successful unless the required upgrades were done and the amps can handle the extra filament current required for the KT150's.
2. Replacing 6550's with KT120's may prove to be successful, provided again the amplifiers can handle the extra current required for the KT120 to operate optimally.
3. For best results, I recommend an amplifier designer around the KT150 tube, where the designer/team has based their circuits utilizing the KT150 optimally.
Which leads to my auditions of the following amplifiers:
ARC Ref75se
ARC Ref150se
ARC Ref250se (will be auditioning this Friday).
CJ ART150 / 300 monoblocks
All of the above incorporate the KT150, and all of them sound superb! Mainly because they're all designed towards the KT150 in mind and nothing else, although if a customer wanted to change over to a KT120, this is easily swapped.
In summary, I have been given the green light from CJ to try out the KT150's on my monoblocks but they warned me about the overall performance, that I won't be getting the full potential since the monoblocks I'm using were designed for 6550's or the KT120 successfully.
If I wanted to take full advantage of the KT150, then a few upgrades are required...
So with that in mind, I'm just sticking to the KT120's.
Cheers, RJ