I jokingly said I would use the DNA-150 in the SEOS12 with a cheap pro 12" woofer over on AVS. Then Erich said maybe an 8". Then I started thinking I might actually do this for cheap and small factor. I'll rest the SEOS along the top of the cab like this: I'll properly recess it and what not once this starts to take form. Here's how I attached it as a temporary thing. It requires the threaded/bolt on adaptor. And this is how it measured: I did a quick few off axis to ensure directivity, but I was pretty crude so won't post them. I'll do a better job once this build actually forms. The DNA-150 really ran out of balls below 2000hz. But a 1500hz xo might be doable. Woofer will be Silver Flute W20RC38-08