Yup, I know I'm probably get beaten over the head for this, but please indulge my curiousity. I'm looking to build a cab (or biamped cab set) that will respond down to a fundamental drop A (about 25hz IIRC) without dropoff. Light enough and small enough for reasonable transport and able to fit through an average sized door. Loud enough for a medium sized gig. Watts are pretty cheap these days, so efficiency is somewhat negotiable. I know the usual argument about the first harmonic will be used, but bear with me. It's just an experiment. All ideas are relevant here. Thanks in advance for your input. I can make some pretty good beer, but designing cabs is not something I know a ton about. If you want to drop by for a brew, ask Zooberwerx for directions.