Visual Sound, Inc. UL Listed Backbox-Recessed-4in Spkr, Steel, 6.25in Sq x 4 in D UL-P625X

Lowell Manufacturing Company FIRE-PROTECTIVE Signaling (ULT-series): (approved backbox for square grille assembly) delivers excellent sensitivity per UL measurement standard (2 watts at 10 ft.) for emergency communications in 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 high-compliance cone speaker), transformer (dual-voltage with parallel input leads and 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: 4