Poly-Planar 11" Speaker Back Cover - White

The Poly-Planar 11" Speaker Back Cover in white is an essential protective accessory for marine and automotive audio installations where weatherproofing and durability matter. Designed specifically for 11-inch speaker applications, this back cover shields the rear speaker cone and internal components from moisture, salt spray, UV exposure, and debris—critical protection in saltwater, off-road, or high-humidity environments. Whether you're upgrading a center console stereo in a truck bed, a marine helm speaker system, or an outdoor recreational vehicle audio setup, this speaker back cover provides the barrier needed to extend speaker lifespan and maintain consistent sound quality.

Constructed from robust polymer material, the Poly-Planar back cover is engineered to withstand the harsh realities of mobile environments without compromising acoustic performance. The white finish resists fading and blends seamlessly with factory or aftermarket trim, while the compact profile—measuring 11 x 5 x 11 inches—ensures a snug, integrated fit behind most standard 11-inch speaker installations. At only 0.4 lbs, installation adds negligible weight to your vehicle while providing superior weather sealing that prevents water ingress, dust accumulation, and corrosion of speaker terminals and voice coils.

Mechanics and audio technicians favor Poly-Planar backs covers for custom marine audio builds, truck bed stereo kits, and outdoor recreational installations where OEM speaker protection is absent or inadequate. Installation is straightforward—the cover mounts directly behind the speaker cone opening using the existing mounting hardware, requiring no modifications to vehicle dash or speaker mounting brackets. This product is ideal for anyone running aftermarket audio in open-air or wet environments, ensuring your investment in quality speakers delivers reliable performance season after season.