JL Audio, Inc. W6v2 13.5-inch Subwoofer Driver (750 W, dual 4 Ω voice coils) 13W6v2-D4

This just might be the best-kept secret in high-performance sub-bass. If you aren't deploying enough power to make a W7AE the best choice, the 13W6v2 can deliver astonishing performance levels in less space, with less power and a lot less weight than a W7AE. Several technologies shared with the flagship W7AE's provide advantages in motor linearity and suspension behavior, which lead directly to reduced distortion and outstanding dynamic balance.