Omni-Alert
| Omni-Alert | |
 All four models side by side. | |
| Company | Whelen Engineering |
|---|---|
| Produced | 2004-present |
| Type | Electronic |
| Sound output | 108-118 dBc at 100 feet |
| Wattage | 400-1600 Watts |
| Documentation | Manual |
General
The Omni-Alert Series, formerly called the Vortex-O Series from 2004-2006, is a line of electronic sirens produced by Whelen Engineering. They are essentially WPS-2900 series siren heads with Type-1 control cabinets that lack voice capability, much like the Vortex series.
Models
| Model | Image | Output | Drivers | Product Sheet |
|---|---|---|---|---|
| OA1 | 
|
108 | 1x400W | OA1 |
| OA2 | 
|
114 | 2x400W | OA2 |
| OA3 | 
|
115 | 3x400W | OA3 |
| OA4 | 
|
118 | 4x400W | OA4 |
References
https://web.archive.org/web/20091208161529/http://whelen.com:80/_MASSNOTIFICATION/omnialert.php https://web.archive.org/web/20040413000235/http://www.whelen.com:80/nondynmc/OutdoorWarn/vortexo.htm