I have a REF 110 with 6550C tube i'm looking for someone who heard the REF 110 with new tubes KT120 (i know it's possible to change them, Kalvin from ARC confirmed it)
I also read somewhere that replacing the 6550`s with the KT 120`s upped the power by 20 watts per side. Or maybe 20 watts total. Can anyone confirm that?
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