I have 4 AC30 OTs on hand, including a '62 Haddon. I know some sound different and I would be surprised if any of them sounded the same. One is modeled after old Haddons. There's one out of the four I am not crazy about but the other three all sound great. Different yet great. Conclusion: a good modern OT is capable of great results, just like a good old transformer is capable of great results.