So I just finished my studio hooked everything back up and tried tracking my mesa single rectifier and 4x12 (miked one speaker) Anyways anytime the track got a little bass heavy my left speaker sounded like something was fluttering inside. I hit the roll off switch on my pre and it took it away for last nite but I think something's wrong because it was only the one speaker not both. Plus at some point I may want my guitar tracks to be the low boy of the mix so I need to address this. I'm going to double check to make sure the volume isn't louder in that speaker than the other but something feels off. Any suggestions?