Jostler3, you are right, I do not have a technical reason why burn-in exists, I have never seen God but that does not mean God does not exist. If you had experienced what Perfectimage did with the two pre-amps would that have convinced you of burn-in or do you need the reason for burn-in to be explained and some how, if possible, scientifically explained. In other words, would you believe what you heard. I think debating this is silly when you can take the time, if you really wanted to and do the comparison yourself. I hope you don't think I am trashing your views, I am not. As you pointed out, I do not have an explanation for burn-in. I don't need one cause I hear it.