I went to my school today because the director of the music department said that we had an old silverface bassman in the closet. Of course, I just assumed it was a 68. It turned out to be a Bassman 50, the one with the master volume. Man, did it sound good! But I want to know what the difference is between that and the AB165 circuit Bassman. Is there a consensus on which one is better, or is it just preference? Because if an AB165 is better than that... well damn.