I finally got my new camera (HD!) so I made a video I've wanted to do for a while.. Compare the '69 and '71 JMPs Both amps are using cabs from the same year. The 69 cab has a new grill but it's quite dense, like a black basketweave. Both cabs have G12M 75hz pulsonic speakers. The playing is a bit ropey, especially at the start, annoyed I f@cked up the Free solo but it's just about publishable! You can really hear the difference 2 amps. I hope you like it, it sounds best LOUD!