Anybody consider a Lab 15 driver in a large sonotube ported sub? Use for me would be for bass augmentation for a large basement stereo as well as intermittent use with a PA system for my band. My thought would be to use maybe a 24" diameter sonotube. I'd be going for a combination of LF extension, some degree of portability, reasonable accuracy and speed, and fairly decent SPLs with sane levels of amplifier power.