Perusing the Stryke site, I saw this 15" DVC driver which models nicely in a vented cab. The SAE 1501,-02, and -03 seems to be variations on the same, with the -02 and -03 progressively more mass-loaded for lower Fs (and lower efficiency). When I plug the 1503 into WinISD for a quick n' dirty, it gives the EBP as 37.2, leaning heavily toward a sealed enclosure. When modelled in a bass-reflex, the extension is outstanding (although in a rather large box). The site lists as suitable for sealed,ported, or PR enclosures. So what's the drawback toward using this low-EBP in a vented enclosure?