shawn, It doesn’t exist.
You should call a reputable dealer, tell him what your system consists of, what sound you are hearing now, what changes you would like to hear, and how much you want to spend. Start with one pair of tubes and see how it works out, then go from there. A good tube seller has many years of experience, and a lot of testing gear, so there’s no good reason for you to try to duplicate all that unless you really want to spend a lot of time getting into tubes. A good seller will accept returns on tubes with problems, so ask what his return policy is.
drewh1, Thanks for the links.
You should call a reputable dealer, tell him what your system consists of, what sound you are hearing now, what changes you would like to hear, and how much you want to spend. Start with one pair of tubes and see how it works out, then go from there. A good tube seller has many years of experience, and a lot of testing gear, so there’s no good reason for you to try to duplicate all that unless you really want to spend a lot of time getting into tubes. A good seller will accept returns on tubes with problems, so ask what his return policy is.
drewh1, Thanks for the links.