I've been playing the Berg AE410 with a GB Shuttle 6.0 for a couple weeks now and the pairing seems pretty solid. Last night, though, either we were playing too loud and/or I'm still getting the hang of the new rig...regardless, this is a question that I've always been too embarrassed to ask, but for the sake of your bass cabinet and to avoid blowing a speaker...when do you know you need to turn down? 1) When the speak cone is moving with every note? 2) You hear distortion and you know you're not overdriving the preamp or clipping the amp? 3) Your bowels begin to churn.