Yesterday I was jamming with one of my roommates. I was playing my Wishbass, which has a considerably lower tone than my Alvarez, through my Hartke Kickback 15. We're just goofin around so I kick the switch to my Microsynth. I still had it set to Sub-Octave all the way up, and Envelope shift from lowest to highest with the rate all the way up. I hit that open E and immediately knew I'd done something horrible. I looked at my amp and it completely tore through the metallic part of the speaker, I'd say the gash was a foot and a half considering the curvature. Let that be a lesson to all of us, always adjust your settings to the instrument you're using.