Simplex 4903-9354 TrueAlert 75CD White Speaker Strobe

The Simplex 4903-9354 TrueAlert Speaker Strobe is a wall-mounted fire alarm notification appliance that combines audible voice signaling with visual emergency notification. This model features a white housing and 75 candela strobe for commercial and institutional fire alarm applications.

The strobe operates on a compatible Simplex TrueAlert addressable signaling circuit, while the conventional speaker connects separately to a compatible audio NAC. This allows the appliance to provide synchronized visual signaling along with amplified voice messages and evacuation tones.

75 Candela Speaker Strobe

The 4903-9354 is specifically identified as the white 75 candela wall-mount model in the 4903 TrueAlert S/V family. The speaker supports both 25 Vrms and 70 Vrms audio circuits, providing flexibility for compatible Simplex voice evacuation systems.

The strobe and speaker are wired separately. The strobe communicates through the TrueAlert channel, while the speaker reproduces amplified analog audio from the system’s audio NAC.

Key Features

• Wall-mounted speaker/strobe notification appliance
• White housing
• 75 candela strobe output
• 25 Vrms or 70 Vrms speaker operation
• Selectable 1/4, 1/2, 1, and 2 watt speaker taps
• TrueAlert addressable strobe operation

Speaker and Strobe Operation

The Simplex 4903-9354 speaker provides selectable 1/4 W, 1/2 W, 1 W, and 2 W power taps. This allows installers to configure the audible output according to the requirements of the voice evacuation system.

The visual portion operates from a compatible TrueAlert controller and provides synchronized flashing. Simplex specifies an operating voltage range of 17 to 31 V for the TrueAlert notification appliance.

Legacy TrueAlert Design

The 4903-9354 belongs to an earlier generation of Simplex TrueAlert speaker/visible appliances. Simplex later identified the white 4906-9253 multi-candela speaker/strobe as the replacement platform for the 4903-9353, 4903-9354, and 4903-9355 models.

For replacement applications, technicians should verify the existing TrueAlert controller, audio voltage, speaker tap, mounting requirements, and overall system compatibility.

4903-9354 Datasheet