Features:
Fire alarm speakers with models for ceiling or wall mount:
• Four inch cone (102 mm) provides high quality tone and voice reproduction
• Multi-tapped design provides output power of ¼, ½, 1, or 2 W with either 25 or 70.7 VRMS input
• In/out wiring terminals for 18 AWG to 12 AWG
• Mounts to 4” square outlet box, 1 ½” deep with 1 ½” deep box extension
• Capacitor input for connection to supervised notification appliance circuits
• Rugged, high impact, flame retardant thermoplastic housings
• UL listed to Standard 1480
• ULC listed to Standard S541, refer to page 4 for required minimum wattage tap per housing type
• Compliant with NFPA 72, 520 Hz Low Frequency Signal Requirements for Sleeping Areas
Rectangular housing models feature:
• Appearance that complements TrueAlert strobes and speaker/strobes
• Red or white housings with “FIRE” lettering for surface or semi-flush wall mount
• Optional matching adapter skirts for covering surface mounted electrical boxes*
• Optional red wire guard
Round housing models feature:
• Off-white color (no lettering) for flush mount on ceiling or wall
• Compatible with optional tile bridge 2905-9946

Introduction
Simplex® 4902 Series speakers provide high quality sound for emergency fire alarm use as well as for background music. The moisture-repellent speaker is designed for smooth frequency response with minimal distortion.
The multi-tapped speaker transformer accommodates either 25 or 70.7 VRMS and provides an output of from ¼ to 2 W to provide flexibility for satisfying the requirements of the installed conditions. Rectangular housing models are for surface or semi-flush
wall mount applications. Round housing models are typically for ceiling applications but can be wall mounted if desired. The rectangular housing speakers are designed to compliment the TrueAlert family of strobes and speaker/strobes, providing conventional, non-addressable speaker operation.

Specifications
Dimensions, Rectangular Wall Mount Housings
Housing Dimensions 5 ?” H x 5” W x 1 ½” D
(130 mm x 127 mm x 38 mm)
Depth into Box 2 ¾” (70 mm)
Dimensions, Round Housings
Housing Dimensions 7 ½” Diameter, ½” D
(191 mm x 13 mm)
Depth into Box 2 ¾” (70 mm)
General Specifications
Input Voltage 25 or 70.7 VRMS
Power Taps ¼, ½, 1, and 2 W
Input Terminal Ratings 18 to 12 AWG
(0.82 mm2
to 3.31 mm2
)
Frequency Response:
Fire Alarm 400 to 4000 Hz
General
Signaling 125 to 12 kHz
Sound Output See information on page 4
Temperature Range 32? to 100? F (0? to 38? C)
Humidity Range 10% to 95% RH from 32? to
122? F (0? to 50? C)