so my band was playing a pretty big show this weekend with a few of my friends bands. so i loaned my cab out to a few bands and no problems. so i set up my rig(svt 3 pro and a few other doo dads) and once we start playing, my speakers are lighting up. i didnt notice it till once of my friends pointed at it. now it did this once or twice in the past(only for my amp) so i'm assuming it has something to do with my amp. i wasnt over driving the cab, its a 610hlf, which i'm underpowering the cab with my head. i just have no idea what is with the speakers. anyone else know or have seen anything like this?