Polyplanar SBC-3 11 " Speaker Back Cover

The Polyplanar SBC-3 11" Speaker Back Cover is a protective enclosure designed for marine and outdoor audio systems where speakers face exposure to harsh environmental conditions. Built for tactical and maritime applications, this back cover shields the rear assembly of Polyplanar's premium audio equipment from saltwater spray, UV degradation, and mechanical damage. Law enforcement and military personnel operating in coastal environments, as well as emergency services with vessel-based communications, rely on protective accessories like this to extend equipment lifespan and maintain operational readiness in challenging field conditions.

Manufactured from high-impact white ABS polymer, the Polyplanar SBC-3 11" Speaker Back Cover delivers rigid structural protection while remaining lightweight at just one pound. The ABS construction resists UV exposure, corrosion from salt environments, and impact damage common in vehicle and vessel mounting scenarios. This durable engineering approach—identical to the proven SBC-2 design—ensures the cover maintains integrity under thermal cycling and prolonged sun exposure without warping or degradation, critical for equipment deployed in uncontrolled outdoor environments where replacement cycles must be extended.

Operators equipping patrol boats, tactical vehicles, and remote communications stations benefit most from this protective solution. The 11-inch size accommodates larger Polyplanar speaker models, providing rear-side concealment and environmental shielding for installations where mounting space and aesthetic integration matter. Proper installation requires alignment with speaker mounting points; users should verify compatibility with their specific Polyplanar speaker model before ordering. The compact profile maintains audio performance while adding a protective barrier that prevents accidental contact with live speaker components during maintenance or field operations.