"Initially we did not approve KT120 as we had not experienced it. Later on we have experienced for long enough time, that KT120′s behaved well and also the amps used in it could handle them without problems. So the final verdict is that all PrimaLuna and Mystère models can use KT120 tubes without problem."
Is Tung Sol the only maker of KT120s currently. I currently have a Quad of these within my PL5 and one thing I have really noticed an improvement on is that on vocals I can really understand what words are being sung r said