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
Preceded by	WS-280 Series
Documentation	Manual

General

The Omni-Alert Series, formerly called the Vortex-O Series, 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.

The product line was originally introduced in 2004 as the Vortex-O Series before being renamed to Omni-Alert Series in 2006.

An older OA2 using a WPS-2800 series head in Pawnee, IL (Pi_User)

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