Hey, I'm on the hunt for a Bassman 400 combo since I think I can get a good deal on it. However, I came across this thread which mentioned that first year Bassman's speakers were defective. I'm a bit afraid of getting a bad amp, the warranty is no good because it's used. Has anyone heard about this problem? How I can detect it - will the speakers sound blown out? Also, anyone heard about this rattling problem? http://www.fenderforum.com/forum.html?db=&topic_number=121979 Additional...does anyone know what year the Bassman 400 first came out? I found out I can determine the production date using the serial number.