Indeed it is a Sterling, owing to the fact that one side is 8 port and the other is 16.

I posted this on YouTube a while back but haven't been able to post it here until now. This video is (surprisingly) slightly out-of-date because I managed to fix many of the teething problems a few weeks after. Any problems I mention are all now fixed... which is a first. Anyway, enjoy this rambleth...

Couple Questions Here: A. Is it normal for competitors to do this?? B. Would this violate any legal implications (i.e. patent infringement, etc.) C. Anyone know why ASC would want to study competition sirens? Are they trying to correct what they deem design faults and not do the same on their siren...

I'd be very surprised if thet were the case.

From what I’m told, those 2 “Allertors” in Hoffman Estates were actually P-15s with Allertor shrouds. I believe Charlie Davidson owns one of them now. I have heard rumors that there was a single-tone 12-port Allertor offered at one time too, but I’ve seen no evidence of it. The only single-tone All...

Work has begun on the Isle of Man. It's a small active system but then again it's a small island. Perhaps another system to drive around and record?

They all look different to me. I don't understand why it would be needed on an STH-10 but if the intake cone on a 2/3T22 were to fall off or be destroyed, then I could understand. Because they all look different to each other, I highly doubt this was a factory option.

It really is a giant frisbee with that picture of it hanging out. Congrats on your new siren.

Federal Model B

That is a Sterling K5 by the looks of things