Ok guys. Referring to my "IHaveADream" build of Dual SMD 18s... I have an idea of using 2 18 inch PRs which would be mounted under (or over) the 18in subs. The PRs would be used instead of incorporating a port. I also like the idea for the WOW factor. The untrained eye/ear will think that there are 4 monstrous subwoofers. I have to do more research myself but what are your thoughts?