Strong on performance, big on flexibility.
Series II woofers delivers the enhanced efficiency and higher output.<CRLF>JBL uses progressive spiders to provide the best possible control at the excursion limits versus much more commonly used linear spiders. The benefit is a far more controlled woofer stroke with far tighter bass characteristics.<CRLF><CRLF>With high-roll surrounds, proprietary cone design and long-excursion, Series II woofers deliver deep, powerful bass, with greater accuracy than conventional woofer. And the exclusive SSI™ (Smart Selectable Impedance) switch lets you choose 2- or 4-ohm impedance for maximum configuration flexibility. It’s everything you want in a woofer.