the true vintage ac30 vox seem to win the "best amp I ever heard" contests all the time. what gives these prized amps the magic tone and why is it the clones come close but never nail the magic. Now on the other hand the fender deluxe I had made from a mission amp kit was every bit as good as true vintage 5e3 deluxes I have played. what is it about the vintage AC30? the iron, caps, speakers ???