There were a bunch of recalls on them. Other then then that I dont believe they were any different then what came after them. once all the recalls are done it is a great amp. I had owned 350 which was a combo but sold it because it was just to heavy to be lugging around.
Yes, call Mesa with the serial number to be sure all of the updates were performed. The amp was issued a little to early and Mesa did not catch some deviant behavior.
