Finding Models of 2001's, Thunderbolts, and Whelen sirens,

[Nudgy]

Thanks guys! That helped so much! But I'm still a little confused about to the Whelen WPS series. Thanks guys! Adam

[DrDanthrax99]

The WPS-4000 series are the directional models, there's the WPS-4003 that only has three active speaker cells, and the WPS-4004 that has all four speaker cells active. As far as I know there's really no way to tell the difference between the two other than one would be louder.

The WPS-2900 series are omnidirectional black-disk like 400W speakers, ranging from WPS-2901 with one cell, to the WPS-2910 with ten.

[Nudgy]

Ok thanks, but with the omnidirectional type. There was like WPS-2700 or WPS-2900. How can I tell the difference between the first two numbers?

[Spencerlovestrains]

The 2700 has white supports, the 2800 black supports, but with large screens, and the 2900 is like the 2800 but with small screens.

[Manitoba]

Since this thread is up, I guess this is a good time to ask a question of my own:

What are the differences between A, B and C-series Thunderbolts?

[E57]

Vortexes have a rectangular rotator and aren't voice capable. 4004's however are voice capable and have a square rotator.

Thank you for the information. I have always been wondering what the difference was, because they look almost the same.

[connerdstines]

Since this thread is up, I guess this is a good time to ask a question of my own:

What are the differences between A, B and C-series Thunderbolts?

A: Horizontally mounted blower, pretty much what you expect a Thunderbolt to be. B: Vertically mounted blower, a C-face motor to drive the chopper, with the collector rings housed in the rotator housing instead of the chopper tube, a different rotator housing design and an eye bolt on the chopper cap. C: Siren head is largely identical to the A series, but uses a blower pretty much like what the B series used. The B and C series blower housings are a bit smaller and more square.

[Alburnett2T22]

I'm trying to find some too, so I can port them to Garry's Mod

[Ziginox]

Vortexes have a rectangular rotator and aren't voice capable. 4004's however are voice capable and have a square rotator.

Way wrong. The rotator is a mark of age, not Vortex/400x series. The older 400x siren heads have a belt-driven rotator with a rectangular housing. The later ones are gear with the square housing. I suppose it's possible all Vortex units are new enough to have the newer rotator.

REF: http://www.whelen.com/install/136/13602.pdf
EDIT: I added more information about the rotators and Vortex units on the 4000 series wiki page
https://wiki.thesirenboard.com/WPS-4000_Series

[4J25]

The Vortex and 4000 series sirens can, however, be identified via the small protrusion on the rotator itself. If the protrusion is a circle, 4000, if it's a square, Vortex. So far I have never seen these prove wrong. Another thing is the control cabinet: If it's just one small, square compartment, it's a Vortex. If it's a Type I or Type II (I don't believe 4000 series sirens used the Type III), which means that there would be extra compartments on the bottom of the controller, then it's a 4000.