Boss Audio Systems CH12DVC 900W Black subwoofer

One 12" Woofer, DUAL 4 ohm 2" Voice Coil, 1800 Watts, 86dB, 36 Hz, Black Dual Voice Coils
A Dual voice coil subwoofer provides more wiring configuration possibilities. If you add additional subwoofers, wiring configurations can be easily matched to optimize the amps power output. Power handling is also increased. Dual voice coil subwoofers are ideal for medium to high-power applications.

Ported Enclosure
This subwoofer will thrive in well in a ported enclosure. A ported enclosure is easy to spot because of the vent (port). This enclosure will be bigger than a sealed enclosure and it also has greater SPL output, resulting in chest-thumping bass with authority. For proper tuning and optimum subwoofer performance in a ported enclosure, we recommend using an amplifier with a subsonic filter.

Sealed Enclosure
This subwoofer will operate well in a sealed enclosure that will yield solid, tight bass. You can either purchase a pre-fabricated enclosure or build one to suit your installation needs. Sealed enclosures are relatively easy to build and are the smallest enclosure the subwoofer is designed for.