These subwoofers feature DMA-optimized, long linear excursion capability to minimize distortion and increase output. W3v3's are available in single 2 ohm, 4 ohm and 8 ohm versions and are superb performers at medium power levels in compact sealed or Multiple patented technologies enhance performance and reliability. As with JL Audios flagship drivers, development was guided by JL Audios proprietary DMA (Dynamic Motor Analysis) modeling system to deliver outstanding dynamic stability and low-distortion operation within their intended power envelope. A neral-filled polypropylene upper cone body with a metallic JL Audio logo medallion provides a classy look, while a removable (and customizable) mounting flange trim ring receives grille-mesh inserts directly, without the need for additional grille hardware. (Grille mesh inserts are sold separately.)ported enclosures.