There were, as far as I know, 6 different EOWS Models
The first batch, in the early to mid 80's, came in the form of these four:
EOWS 408, EOWS 812 (816?), EOWS 115, and EOWS M*12
The EOWS M*12 was a large speaker array to be mounted on a police car to be used for mass notification. Needless to say, I don't think these were hot sellers.
http://www.jmarcoz.com/sirens/sc3.pdf
http://www.jmarcoz.com/sirens/sc4.pdf (the dB ratings in this catalog are badly inflated, IMO).
After that, in the mid-1980s, the EOWS 1212 replaced the EOWS 115 (exact same siren as the EOWS 115 but with the same time of speaker design as the rotating EOWS models), while the EOWS 612 consolidated the EOWS 408 and 812 into one model.
In the early 1990's, the EOWS 1212 was phased out in favor of the much more customizable Modulator while in the mid 1990s, the EOWS 612 became a special order only unit that Federal did not advertise (though it popped back up in advertising literature in the early 2000s when Federal Signal Industrial popped up--it since has vanished from their website).
Video Reference:
EOWS 612 in Alert and Attack:
http://www.youtube.com/watch?v=u83U3qwi ... re=related
EOWS 612 being removed (I don't remember seeing this one either. Anyhow, it gives you an idea how big they are):
http://www.youtube.com/watch?v=webIc6-DoEk
EOWS 812 in Alert:
http://www.youtube.com/watch?v=RwZP5xQZMTY
EOWS 1212 in Alert:
http://www.youtube.com/watch?v=0Z7pX4TSsHo
Pictorial Reference:
EOWS 812:
http://flickr.com/photos/robsv/179911447/
EOWS 408:
http://flickr.com/photos/connors934/137 ... 121064384/
EOWS 408 on the ground:
http://flickr.com/photos/connors934/137 ... 121064384/
EOWS 612:
http://flickr.com/photos/connors934/153 ... 121064384/
EOWS 1212:
http://x1b.xanga.com/951c5506c313318200 ... 252808.jpg (from our very own mhmcdonal)
EOWS 115:
http://i145.photobucket.com/albums/r218 ... MG2416.jpg (from our own 500 AT Fan)
P.S. For more EOWS/Modulator pics from the Flickr album above (including more of the 408 on the ground), see
http://flickr.com/photos/connors934/set ... 121064384/