Boston Acoustics, Inc. Car Audio, Subwoofer G312

2¾-inches of peak-to-peak excursion 2½" 4-layer voice-coil Radialvent® cooling, for increased power handling SureSet™ impedance selection and overdrive protection Multiple enclosures types and tuning options available Integral sealing gaskets simplify both standard and inverted mounting Available in dual 4-ohm and single 4-ohm versions View Woofer Size Chart