Eminence's Delta 10A could be the basis of a little Karlson which could fill a small club. I dislike large speakers which can't do anything right. Here's an old "K10" size coupler with Delta 10A, a generic xover and a Transylvania tube on top recorded on a Zoom Q3. A tube can be made from ABS pipe. It might be a bit hot on the treble as didn't have a pad in sight. The HF driver is a P-Audio BMD440. I'm still fascinated by the power of a Karlson on transients for almost no cone movement.
10" Karlson cabinet with Delta 10a and Transylvania "The Tube" - YouTube
10" Karlson cabinet with Delta 10a and Transylvania "The Tube" - YouTube