Okay so I'm in the market for subs either already built or a little DIY and some elbow grease. Some of the contenders I'm thinking of are the Captivator 4000, RS2, and Captivator Pro18, Bassboss ZV28 or building some meaty Eminence 21 Ipals, BC21DS115's, SHS24's. I'd like some graphs measurements from the Captivator 4000, RS2, and Pro18 but couldn't find them anywhere to help me make an informed decision. The subs are going to be for both theater and music playback. I love the idea of very low port tunings and high SPL.