Our enclosed subwoofers are ideal for applications where an infinite-baffle design is not suitable. The enclosures are built in our Miramar, Florida factory with 100% fiberglass (not plastic) construction. This makes them rigid, for better bass performance, and more durable over the long term. Available in black or white finishes, with a subwoofer driver installed. These JL audio marine enclosed subwoofers offer the type of bass experience that has made it top of the lists in the automotive and sounding space.