i just saw the original guns n roses playing knockin on heavens door on tv live, and from what i could see of the bass amps, it looked like duff was using a goliath and a big ben. i say a big ben as it was too big to be a 15". the goliath looked like a goliath III, same kind of metal grill protecting the speaker, and the same tweeter that really stands out. i was under the impression that the general concensus was that he played GK amps, am i crazy, or did he use swr? also, was the goliath III even available back then?