Model 300GCX 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.


Voltage 24VDC
24VAC 50/60Hz
120VAC 50/60Hz
240VAC 50/60Hz
Mount Surface
T-Code** T3, T2C, T6
Operating Current* 0.67 Amps at 24VDC
0.90 Amps at 24VAC
0.20 Amps at 120VAC
0.10 Amps at 240VAC
Operating Temperature Minimum -67 °F
Operating Temperature Maximum 150 °F
Decibel Output 110 at 10 Feet
120 at 1 Meter
Standby Current 50 mA at 24VDC
100 mA at 24VAC
30 mA at 120VAC
15mA at 240VAC
Enclosure Rating Type 4X
Height 12.400 in
Width 7.900 in
Depth 8.500 in
Net Weight 5.50 lb
Shipping Weight 6.70 lb


IP69K Compliant Products Video (1:33)

Ordering Information

Model Types
Model Description UPC
300GCX-024 SelecTone 15W amplified speaker, 24VAC/DC, hazardous Location 782979200352
300GCX-024-B SelecTone 15W amplified speaker, 24VAC/DC, hazardous Location, black 782979246923
300GCX-120 SelecTone 15W amplified speaker, 120VAC, hazardous location 782979200376
300GCX-120-B SelecTone 15W amplified speaker, 120VAC, hazardous location, black 782979246930
300GCX-240 SelecTone 15W amplified speaker, 240VAC, hazardous location 782979200383
300GCX-240-B SelecTone 15W amplified speaker, 240VAC, hazardous location, black 782979246947
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