Actually Eric you are right on. I have thought that was the answer but never took the time to really find out. I guess the manufacturers think you have already done your homework and know what your are looking for.
So far I have not found any of the many vids that have convinced me that this sounds like the actual amp that it is supposed to model.
So basically you buy this and do away with a room full of vintage amps.
Sorry but I have played through vintage amps. Sorry Line 6 but not convincing.