Who made this

[Undertaker]

I remember a friend having an electronic siren on his station wagon that was called a Dominator I think. It had a very distinct and pleasing yelp as I remember. It was only a 58 watt siren like the Federal Director and Interceptor. Who made this Domintator as I never saw any advertisements for it or where you even could buy one. I could almost duplicate that sound by placing the knob between yelp and HiLo on an Interceptor.

[AllSafe]

Whelen.