Model Q408 is a welded steel protective enclosure having a volume of 1 cu. ft. (.028m3). The interior is undercoated to eliminate metallic resonance and is furnished with 1 1/2" (38mm) thick fiberglass with a 1 1/2 lb./cu. ft. density. The large volume of this enclosure improves the low frequency response of the system while the fiberglass controls undesirable resonances in the high end of the frequency spectrum. This cylindrical enclosure incorporates a plaster flange and has provisions for mounting a variety of architecturally pleasing AtlasIED grilles. Enclosure is designed for use with standard 8" (203mm) speakers. Galvanized steel finish.