audio Research REF 110 and KT 120 tubes

Tlg...ARC is NOT using the KT-120 in any power supply in any of their products. 6550 only...I have KT-120's

As a follow up, the problem was, as I suspected, with the temporary pre. The KT-120s are not strident in the lower treble or upper mids. Rather it is an upgrade that can be heartily recommended all around.

I just put 2 matched pairs in my VS55 and biased them to 65 and they sound great much better bass. Over all seemed to impart a greater sense of power. I had been using NOS tungsol 6550 and my first impressions are that the KT 120's sound as good in the highs and midrange and much better bass with my dynaudio excite 16 speakers only about 10 hours so far I would think that they need bait more time to break in

I just put 2 matched pairs in my VS55 and biased them to 65 and they sound great much better bass. Over all seemed to impart a greater sense of power. I had been using NOS tungsol 6550 and my first impressions are that the KT 120's sound as good in the highs and midrange and much better bass with my dynaudio excite 16 speakers only about 10 hours so far I would think that they need bait more time to break in

Just adding this list to help out anyone who may stumble upon this thread.

Credit for this goes to A'gon member Hifigeek1. He posted this on another thread.

04-19-12: Hifigeek1

The following is a list of ARC amps that are authorized to use the KT-120:

VS55, VSi55, VS60, VSi60, VS110, VS115, REF110, VM220. I hope people find this useful as there seems to be a lot of confusion about it.