Model 300GCX-CN SelecTone® Amplified Speaker is designed to produce tones, digital voice messages and live public address in harsh environments with high ambient noise levels.
The rugged speaker cone and projector are constructed of spun aluminum. The amplification circuitry, tone module, and gain control are contained in a housing constructed of die-cast aluminum. All surfaces are sealed with powder-coat paint. Dust- and moisture-proof gaskets provide protection from the elements.
SelecTone Amplified Speakers are used individually or as part of a plant-wide emergency notification system. Model UTM Universal Tone Module with 32 tones or model TM33-SD 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 installed into each SelecTone Amplified Speaker and wired to a central controller, SelecTone Command Unit or CommCenter® Digital Message Center. Command Units and CommCenters broadcast tones, voice messages, melodies and live public address to an unlimited number of SelecTone Amplified Speakers.
Applications for SelecTone include emergency warning, evacuation, start/dismissal, public address, and process control signaling.


Electrical Operating Temperature -67°F to 150°F (-55°C to 66°C)
Certified Operating Temperature -22°F to 150°F (-30°C to 66°C)
Power Rating 15–Watts


IP69K Compliant Products Video (1:33)

Ordering Information

Model Types
Model Description UPC
300GCX-024-CN SelecTone 15W amplified speaker, 24VAC/DC, hazardous location, zone listed 782979247166
300GCX-120-CN SelecTone 15W amplified speaker, 120VAC, hazardous location, zone listed 782979247173
300GCX-240-CN SelecTone 15W amplified speaker, 240VAC, hazardous location, zone listed 782979247180
UTM Universal tone module 782979202172
TM33-SD Tone module, custom, Series D 782979227335
AM25CK Connector card, 25vrms 782979600855
AM70CK Connector card, 70vrms 782979600862
300CK Connector kit 782979391203
T-300CK 2.7 Vrms, 1 Vrms
E-300CK 1 Vrms, 1 Vrms
Replacement Parts
Description Part Number UPC
PCBA, 24V, 15W K2001961B-05 782979127598
PCBA, 120/240V, 15W K2001961B-04 782979127581
Transformer, XFMR, 120VAC, 1.3 Amp, 15W K120857A 782979125761
XFMR, 240VAC, 1.8A, 30W K120858A 782979125778
Amplifier Assembly, 15 Watt, For Series D K2005502A-04 782979126454
15W Speaker Assembly, Gray K8593082A 782979122531
15W Diaphragm, Voice Coil, Butterfly Assembly K8593035A 782979121138
Housing Gasket K288A043 782979115335
Housing, Gray K8473021A 782979114581
Cover, Selectone, Gray K8473022A 782979114499