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Replacing 12AU7's with E80CC's in a Unison S2K

Posted by Rick on November 4, 2002 at 14:38:31:
I have seen some posts from a while back suggesting that owners of the Unison Research Smart 845 integrated amps have substituted E80CC tubes for the 12AU7's with excellent sonic results. I am wondering if anyone has tried this with the Unison Research S2K integrated amp that uses KT 88's and 12AU7's? Also, does anyone have any experience that would suggest that the tube life would be shortened with such a substitution?