Use Atlas Sound 194 Series protective enclosures for recessed or surface mounting of 830 Series clock/speaker baffles. The 194 Series models contain 12 triple-compound conduit knockouts (six on both top and bottom) to facilitate easy wiring; 195 Series has 12 knockouts (four on both top and bottom, two at each end). Enclosures are constructed of 20-gauge CRS and are heavily undercoated to prevent mechanical resonances. Units contain a compartment divider to separate high and low voltage wiring. Models for surface application include an (SM) prefix and are finished in textured white epoxy to match the clock/speaker baffle panel.