Visual Sound, Inc. UL Listed Backbox-Recessed-4in Spkr, Steel, 10in Sq x 4in Deep UL-P68X

Lowell Manufacturing Company FIRE-PROTECTIVE Signaling (ULD-series or ULS-Series): (approved backbox for square grille assembly) provides clear signal for indoor alarm or voice communication in emergency warning systems or general public address in high-rise hotels, schools, apartment complexes and similar venues. Conforms to NFPA Standard 72A and is listed under UL1480 (5th edition) Fire Protective Signaling. Assembly includes speaker (15W dual voice coil), transformer (2 factory-wired dual-voltage transformers with DC blocking capacitor on 1 input, taps at 0.25, 0.5, 1, 2, 5W @ 70/25V), and grille (round or square steel, white). IMPORTANT: to maintain UL-Listing, assembly must be used with approved UL-Listed backbox and compatible control equipment. Order separately. Speaker size: 8" FIRE-PROTECTIVE Signaling (ULS-series): (approved backbox for square grille assembly) provides clear signal for indoor alarm or voice communication in emergency warning systems or general public address in high-rise hotels, schools, apartment complexes and similar venues. Conforms to NFPA Standard 72A and is listed under UL1480 (5th edition) Fire Protective Signaling and UL2043 for plenum use. Assembly includes speaker (15W single voice coil, dual-cone), transformer (1 factory-wired dual-voltage transformer with DC blocking capacitor, taps at 0.25, 0.5, 1, 2, 5W @ 70/25V), and grille (round or square steel, white). IMPORTANT: to maintain UL-Listing, assembly must be used with approved UL-Listed backbox and compatible control equipment. Order separately. Speaker size: 8