You can find 15-inch subwoofers in wireless and wired varieties for home theater audio systems. These are typically called powered subwoofers and come with an enclosure from the manufacturer.

MAXIMUM SOUND: Singe 15-inch vented style subwoofer box aims to maximize your subwoofers' sound IDEAL FIT: Single-port design allows you to fit 1 subwoofer for optimal sound 32 HERTZ: Enclosure ...

QPower QBOMB15V 15-inch dual ported subwoofer box SUBWOOFER SIZE: 15-inch high power subwoofer with a mounting depth of 8.25 inches to turn up your car audio bass SUBWOOFER SPECIFICATIONS ...

The standard 10-, 12-, and 15-inch versions of the ... Since it is a shallow-mount subwoofer, it only requires 0.25 cubic feet of volume in a sealed box, or 0.75 cubic feet of volume in a vented ...