Federal Signal’s Model 300X SelecTone® Amplified Speaker is designed to meet UL 1480 intelligibility requirements producing crisp, clear tones, digital voice messages and live public address in harsh environments with high ambient noise levels.

All surfaces are sealed with powder-coat paint and assembled with stainless steel hardware. Dust- and moisture-proof gaskets provide protection from the elements. This housing incorporates a tool-less rear cover design, eliminating the need for torque specific hardware and solves the problem of missing or lost fasteners.

SelecTone Amplified Speakers are used individually or as part of a plant-wide emergency notification system. The Model UTM Universal Tone Module, with 32 tones, or the TM33 Custom Tone Module is plugged into a single SelecTone Amplified Speaker for stand-alone use or into a SelecTone Command Unit for plant-wide signaling.

For plant-wide signaling, a Connector Kit is required for each SelecTone Amplified Speaker and wired to a central controller. SelecTone Command Units and CommCenter® Digital Message Centers broadcast tones, voice messages, melodies and live public address to an unlimited number of SelecTone Amplified Speakers.

Applications for SelecTone include emergency warning, plant evacuation, start and dismissal, public address, and process control.


Voltage 24VDC
24VAC 50/60Hz
120VAC 50/60Hz
240VAC 50/60Hz
Mount Swivel Bracket
T-Code** T6
Operating Current* 1.30 Amps at 24VDC
1.30 Amps at 24VAC
0.50 Amps at 120VAC
0.50 Amps at 240VAC
Operating Temperature Minimum -67 °F
Operating Temperature Maximum 151 °F
Decibel Output 110 at 10 Feet
120 at 1 Meter
Enclosure Rating Type 4X
Ingress Protection (IP) IP66
Standby Current 0.31 Amps at 24VDC
0.31 Amps at 24VAC
0.08 Amps at 120VAC
0.04 Amps at 240VAC
Height 17.000 in
Width 13.100 in
Depth 16.300 in
Net Weight 16.30 lb
Shipping Weight 22.80 lb

Ordering Information

Model Types
Model Description UPC
300X-024 SelecTone speaker/amplifier, 15 watt, 24VAC/DC, explosion-proof 78297920060
300X-120-240 SelecTone speaker/amplifier, 15 watt, 120/240VAC, explosion-proof 78297922145
UTM Universal tone module 782979202172
TM33-SD Tone module, custom, Series D 78297922733
AM25CK Connector card, 25vrms 78297960085
AM70CK Connector card, 70vrms 78297960086
300CK 10 Vrms, 1 Vrms
T-300CK 2.7 Vrms, 1 Vrms
E-300CK 1 Vrms, 1 Vrms
Replacement Parts
Description Part Number UPC
PCBA, 24V, 15W, Class D K2005618A-03 782979241126
PCBA, 120/240V, 15W, Class D 300X and T-300X K2005618A-05 782979241133
Projector assembly, 14W, gray, 300X K8593100A 782979205500
Bracket assembly, mounting, black, 300X, 304X, 302X, 314X K8593071A 782979205050