The LA-1CH model—designed to meet the city of Chicago’s stringent requirements and dubbed the ‘Chicago’ loudspeaker—is installed in regions where building code requires conduit to be used despite the fact that the LA-1 model already meets UL 2043 Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces.
Both the LA-1CH loudspeaker and the junction box used to house the hub meet Chicago requirements.
The enclosure and junction box are made of steel. The cabling is contained within flexible metal tubing (FMT), listed for use in plenums and other air handling spaces.
Where it enters the enclosure, this specialized conduit terminates in a one-piece zinc connector fitted with a rubberized polymer gasket, forming a smoke-tight seal as required by the NEC. The junction box is also sealed.
A flame retardant fabric located below the speaker grille prevents the accumulation of dust.