KT150 in ARC Ref 75/150/250 amps ? ..... - Page 2
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  1. #11
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    I don't know about ARC amps but I have been using KT-120's in my old Ray Lumley M-100 mono blocks. They came with KT-88 tubes but I kept having them blow so I decided to try KT-120 and all has been well so far. I don't think the new KT-88's are as rugged as they used to be. I kept track of the temperature of the transformers in each amp with a heat probe and didn't notice any significant change from when I was using the KT-88's. I guess the filament heater windings are up to the task.

    I don't think I'll press my luck with KT-150's, the tranny's are too hard to replace. If I had ARC amps, I would probably would wait until I knew it was safe to use them.
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  2. #12
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    I think the KT-120 and KT-150 tubes just may be game changers in terms of improving the sound of all amps that can use them as well as tightening up the bottom two octaves of bass and giving us the type of bass that we didn't think tubes were capable of. I first heard this for myself with the ARC VS115 that I previously owned that had the KT-120 tubes installed. I did a review of the Raven Audio Silhouette Reference monoblock amps for PFO that used four KT-150s per side and I was very impressed with this tube. Raven had sent me two quads of NOS Tung Sol 6550s to try as well (and I mean the real ones, not the modern day Russian version) and I much preferred the KT-150 tubes overall. I just bought an ARC REF 75 which was designed for the KT-120 tube vice being compatible with the KT-120 and I really like it.

  3. #13
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    Quote Originally Posted by mep View Post
    I think the KT-120 and KT-150 tubes just may be game changers in terms of improving the sound of all amps that can use them as well as tightening up the bottom two octaves of bass and giving us the type of bass that we didn't think tubes were capable of. I first heard this for myself with the ARC VS115 that I previously owned that had the KT-120 tubes installed. I did a review of the Raven Audio Silhouette Reference monoblock amps for PFO that used four KT-150s per side and I was very impressed with this tube. Raven had sent me two quads of NOS Tung Sol 6550s to try as well (and I mean the real ones, not the modern day Russian version) and I much preferred the KT-150 tubes overall. I just bought an ARC REF 75 which was designed for the KT-120 tube vice being compatible with the KT-120 and I really like it.
    Well my KT150s are arriving today and I will be putting them into my REF75. I know there a those who are using this tube, including the designer of my speaker Carl from Nola and swear by it in the REF75.

    I think ARC showing their Gallileo line with the KT150s are a good sign of where they are headed.

  4. #14
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    Quote Originally Posted by Priaptor View Post
    Well my KT150s are arriving today and I will be putting them into my REF75. I know there a those who are using this tube, including the designer of my speaker Carl from Nola and swear by it in the REF75.

    I think ARC showing their Gallileo line with the KT150s are a good sign of where they are headed.
    Any KT150 update? Did your amp blew up?

  5. #15
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    So it seems like ARC is testing out the KT-150 in current production amps and as Priaptor mentioned they are designed into the new G Series amps. From what I understand they are quietly sanctioning current production amp owners (Ref 75/250/750) to try out the KT150s, although ARC is not yet selling the KT150s directly (which comes with there extensive tube testing and quality assurance process). I sent in an enquiry about using the KT150 in my Ref 110s (1 generation old at this point...predecessor to the Ref 150) and am waiting to hear if they have tried them out in that amp and if it's ok as a drop-in replacement with same bias settings (I believe 65mA).

    For those interested, here is a link to Audio Research's first newsletter (there will be 3 a year) in which they talk about the KT150, the new G Series, and profile/interview their chief listener, Warren Gehl: http://www.audioresearch.com/Content...volume%201.pdf
    Cyril
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  6. #16
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    [QUOTE=Priaptor;77723]Well my KT150s are arriving today and I will be putting them into my REF75. I know there a those who are using this tube, including the designer of my speaker Carl from Nola and swear by it in the REF75.

    Hello Priaptor. You said the day June 4, put their new 150 KT in his Ref 75. Could tell us how is the sound.
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  7. #17
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    [QUOTE=nonesup;79817]
    Quote Originally Posted by Priaptor View Post
    Well my KT150s are arriving today and I will be putting them into my REF75. I know there a those who are using this tube, including the designer of my speaker Carl from Nola and swear by it in the REF75.

    Hello Priaptor. You said the day June 4, put their new 150 KT in his Ref 75. Could tell us how is the sound.

    He spent some time talking about what he heard with the KT-150s over at WBF. I think you could safely say he is ga-ga over them.

  8. #18
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    [QUOTE=mep;79821]
    Quote Originally Posted by nonesup View Post


    He spent some time talking about what he heard with the KT-150s over at WBF. I think you could safely say he is ga-ga over them.
    They are the best upgrade you will ever get for 350 bucks (assuming you are talking a REF75)!!

    Just amazing. Listening to Mozart's String Quintets right now and all I can say is amazing. One of my favorites and I can say every album I play I am hearing stuff I have never heard before. The cello on this is frightening.

    These tubes are highly recommended!

  9. #19
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    [QUOTE=Priaptor;80115]
    Quote Originally Posted by mep View Post

    They are the best upgrade you will ever get for 350 bucks (assuming you are talking a REF75)!!

    Just amazing. Listening to Mozart's String Quintets right now and all I can say is amazing. One of my favorites and I can say every album I play I am hearing stuff I have never heard before. The cello on this is frightening.

    These tubes are highly recommended!
    Hi Priaptor.

    Use you, 65 mv bias as KT 120?


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  10. #20
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    Re: KT150 in ARC Ref 75/150/250 amps ? .....

    Albert Porter rolled KT150 in his ARC Ref250 last night and very happy with the results. He didn't even need to change the bias.

 

 
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