My understanding is that you try different tubes in one component. Such a Sovtek, Western Electric, etc. seeking the best sound or the individual sound qualities that each tube brings. Or maybe rock sounds better with one and classical with another. Contact mofimadness as he has drawers of tubes that he uses. I guess it is kind of like a chef using different spices and seasonings to individualize each palate. I would like to do it but only have one set of tubes so far.
