Simplex 4902 multi-function fire alarm speaker

Simplex 4902 Series Multi-Application Speakers

The Simplex 4902 Series are multi-application fire alarm speakers designed for use in emergency notification systems while also supporting background music playback. Built with moisture-resistant construction, a wide frequency response, and low distortion, they deliver clear, high-quality sound for both fire alarm signals and voice announcements.

Key Features

Flexible Input Power

• Supports 25 VRMS or 70.7 VRMS operation

• Power taps: ¼ W, ½ W, 1 W, and 2 W, selectable via built-in tap switch

Moisture-resistant, high-quality audio

• 4-inch (102 mm) cone speaker ensures efficient, clear sound reproduction

Convenient terminal connections

• Accepts 18 AWG to 12 AWG wiring (0.82–3.31 mm²) with in/out screw terminals

• Includes blocking capacitor for supervised wiring circuits

Durable housing materials

• Constructed of impact-resistant, flame-retardant thermoplastic

• UL 1480 listed, compliant with NFPA 72, UL/ULC, FM, CSFM, and MEA (NYC approved)

Multiple mounting options

• Wall-mount (rectangular): Designed to match TrueAlert strobes/speaker-strobes, marked with “FIRE”; compatible with adapter skirt and protective wire guard accessories

• Ceiling-mount (round): Light white housing without lettering, ideal for ceiling or wall installation; compatible with tile bridge (p/n 2905-9946) for drop-ceiling mounting

Technical Specifications