MA Audio has released its XQ & QS series Subwoofers for cars. It comes with an aluminum basket for light weigh and great strength, a double stitched Glafibe surround, dual 4 ohm or single voice coils XQ or QS Subwoofer. They are available in 8, 10, 12, and 15-inch sizes. Be sure your amp is strong enough support them.

[via TechFresh]