I have a new ST-120 with 6550WE. I love the sound of the 6550WE tubes and the reviews with the ST-120/6550WE's are great too. I wanted to have a spare tube/s on hand just in case there is an issue with one of the installed ones dying. Is one tube enough as a spare? I hear that they will fail one at a time. So for my second and related question. Do I get multiples as spares that are matched? If I change out 1 tube at a time then matched wouldn't matter I guess. Do I need to get 4 matched now and if one of my originals go out, do I replace all 4 with new matched ones?
Thanks and Happy Holidays!
Thanks and Happy Holidays!