Federal Signal 55 and 56 Resonating Horns
The Federal Signal models 55 and 56 are resonating horns that produce sound by means of a diaphragm, which resonates a column of air. With greater output than a vibrating horn, the resonating horn can be used wherever a louder, more powerful alert is needed.
These projectors designed to match the frequency of the vibrating diaphragm to produce a smooth tone. The housings are tapped for 1/2″ conduit.
Federal Signal 55 and 56 have sufficient output to penetrate through high ambient noise levels and have a duty cycle of five minutes on, five minutes off.
Key features include:
- Federal Signal 55 – 24VAC and 120VAC
- Federal Signal 56 – 24VDC, 125VDC and 250VDC
- Model 55 produces 105 dBa @ 10′ (115 dBa @ 1m)
- Model 56 produces 106 dBa @ 10′ (116 dBa @ 1m)
- Corrosion resistant cast aluminum housing and spun brass projector
- Indoor/outdoor use
- Weatherproof, water- and dust-tight
- Swivel bracket included
- Type 3R enclosure
- Model 55-120-1 UL Listed and CSA Certified
- Product Code: 55 and 56
How to order (Specify Model):
1) Select Model 55 / 56, Voltage
| Model | UPC Code | Description |
| 55-024-1 | 782979228806 | Resonating Horn, 24VAC, Gray |
| 55-120-1 | 782979228905 | Resonating Horn, 120VAC, Gray |
| 55-120-1BK | 782979224358 | Resonating Horn, 120VAC, Black |
| 56-024-1 | 782979229506 | Resonating Horn, 24VDC, Gray |
| 56-048-1 | 782979241188 | Resonating Horn, 48VDC, Gray |
| 56-125-1 | 782979229605 | Resonating Horn, 125VDC, Gray |
| 56-250-1 | 782979229704 | Resonating Horn, 250VDC, Gray |
Replacement Parts:
| K8283C071-0G | 782979108276 | Projector, 55/56 Horn |
| K8233A046-0G | 782979118442 | Mounting Bracket Assembly Kit, Including Bulkhead Mounting Kit |
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