The Federal Signal Models 304GC and 314GC Amplified Speakers are designed to produce crisp, clear tones in supervised alarm notification systems. These amplified speakers can broadcast tones generated by a tone card installed into the speaker (the plug-in 32-tone UTM*) or by a central tone source in a voice evacuation or paging system. When live public address or voice messages are required, plug-in Connector Cards (AM25CK or AM70CK) interface with the  Vrms of the EVAC panel.

Both amplified speakers are compatible with fire alarm and suppression supervised control panels and power boosters.

The rugged construction and high output of the Models 304GC and 314GC make it ideal for use in harsh environments with high ambient noise levels. Both models feature an internal gain control for adjustment to the suit area.

*ULC Canadian Fire Listed Models (-CN models) can only be used with a UTM tone card


Voltage 24VDC  
Operating Temperature -40°F to 150°F -40 °C to 66°C
Enclosure Rating Type 3R, IP54  
  304GC 314GC
Operating Current 0.7 amps (1.0A Regulated 16-33VDC) 1.3 amps
Standby Current 0.15 amps 0.15 amps
Decibels per UL1480 95 @ 10' (105 @ 1M) 108 @ 10' (118 @ 1M)
Decibels on Axis 108 @ 10' (118 @ 1M) 112 @ 10' (122 @ 1M)
Net Weight 4.5 lbs (2.0 kg) 6.1 lbs (2.8 ks)
Heights 12.4" (314mm) 13.9" (353mm)
Width 7.9" (200mm) 10.2" (258mm)
Depth 8.5" (216mm) 9.9" (252mm)

Ordering Information

Model Types
Model Description UPC
304GC-024 SelecTone, 24VDC, gain control, UL, gray 782979208372
304GC-024-CN SelecTone, 24VDC, gain control, ULC, gray 782979221401
304GC-024-CN-R SelecTone, 24VDC, gain control, ULC, red 782979232476
314GC-024 SelecTone, 24VDC, high power, UL, gray 782979208341
314GC-024-CN SelecTone, 24VDC, high power, ULC, gray 782979221425
UTM Universal tone module 782979202172
AM25CK Connector card, 25vrms 782979600855
AM70CK Connector card, 70vrms 782979600862
Replacement Parts
Description Part Number UPC
4-Position power plant board assembly K140340B 782979112969
Voice coil, Series C K8593035A 782979121138
Speaker assembly, 15 watt, 4X, grey K8593082A 782979122531