The rugged speaker cone and projector are constructed of spun aluminum. The amplification circuitry, tone module, and gain control are contained in a housing constructed of die-cast aluminum. All surfaces are sealed with powder-coad paint. Dust- and moisture-proof gaskets provide protection from the elements.
The 300GCX is UL listed for Class I, Division2, Groups A, B, C, and D; Class II, Division 3, Groups F and G; and Class III. It has been tested and approved for use in Type 4X applications.