New KT150 tubes?

Here's an update. FWIW.

My ultimate goal is replace my ARC REF separates including Classic 120 monos with a very good integrated while maintaining (to some extent) the sonic attributes of my current set up. Discussing my options with an ARC dealer yesterday, he was saying that the GSI75 with KT150's is due out in early 2015. It will probably be introduced at CES in January for a release to market thereafter. He is checking with ARC to get a release date and wether it will sport a Phono stage and a DAC in the same box as originally announced by ARC a few months ago. Me, i don't think that they can put both in the same box for obvious reasons hence the delay.

OTOH, what about a REF75 with KT150. He told me that ARC will not ship a REF75 or REF150 with KT150 even if a customer ask for it and willing to pay the added cost. Although the specs are nearly identical for the REF150-GS150, he says that those are only the tip of the iceberg. The electrical design of the GS150 is different from the REF150 and is optimized for the KT150.

He is not sure if the amp is going to age prematurely with KT150. This is an ARC question to answer.

Thanks Smoffatt. Looking forward to learning about the circuitry changes in the GS-150. So far, the ARC web site gives no clue.

Spoke with DG at ARC today and he said electrically engineering has signed off A OKAY for use with the KT 150 with the
ARC amps below. But from a Mechanical standpoint one must take note with clearance and observe the larger 150s can vary on glass height with Cages and such could be a close call in some situations etc.
Enjoy, Merry Christmas
Johnny R Audio Connection
VSI 60
VSI 75
Ref 75
Ref 150
Ref 250
Ref 750

I don't own an ARC amp, but having followed this issue I feel I can finally sleep at night knowing the suspense and drama presented to the ever cautious ARC owner by the 150 dilemma is finally resolved. Whew...now I gotta buy some stock in Tung Sol.

There are a quite a few ARC amps where the tubes will not clear the top cover. Be advised.