I assume that this is a Carter siren.

http://flickr.com/photos/russell_w_b/244424930/

http://flickr.com/photos/chaseastwood/251670297/

Here is a link to one of Seattle's old Victory siren's. http://flickr.com/photos/chrissam42/53856318/

Here is mystery siren/horn's cousin.
http://www.flickr.com/photos/admitone/89040787/

Jim_Ferer wrote:FWIW, they don't look old. P-15s. I wonder what motivated the replacement?

The P-15s are part of the penetrator series, aren't they? They can't be speakers. They look like electromechanical sirens.

Who posted that 30 ft long horn on top of this one building in the old forum? It looked like a giant yellow musical horn. Was it a really odd looking siren or just a decoration?

I believe that they are Model D sirens, because the Model A has a straight, conical intake horn and a smaller rotor. This three-siren arrangement was sold for use in very small towns. Here's an example of multidirectional horns from Mt. Shasta, California. These are the horns I remember hearing thr...

Wow, a 12.5" diameter driver that mounts to a 44" squared horn. I want one. I don't know what for, but I do. :D This looks like an M4-loaded horn next to some even bigger monsters! http://www.community.chester.pa.us/main/html/horndriver/3a.JPG What the heck is this thing that you are buil...

douro20 wrote:It's a Toshiba blower-fed siren. Single-tone, 120dbC. They are the only ones known to exist in the US. The power plant and the sirens were both installed by Toshiba.

So in addition to laptops and electronics, they make sirens?