Vortex series
| Vortex series | |
| File:Official Vortex-R.jpeg | |
| Company | Whelen Engineering |
|---|---|
The Vortex-R Series is a line of electronic sirens produced by Whelen Engineering. They are essentially 4000-series siren heads with Type-1 control cabinets that lack voice capability, much like the Omni-Alert series. Unlike the 4000 Series, one- and two-driver models were offered. Older models have a large fin mounted on the rear of the driver assembly, a trait inherited from the 4000 series.
Models
| Model | Output dBc | Drivers | Product Sheet |
|---|---|---|---|
| VORTEXR1 | ? | 1 | VORTEX1 |
| VORTEXR2 | ? | 2 | VORTEXR2 |
| VORTEXR3 | 127[1] | 3 | VORTEXR3 |
| VORTEXR4 | 129[2] | 4 | VORTEXR4 |
Output ratings for the R3 and R4 are assumed from the 4003 and 4004.