Which siren has the most menacing tone?

[500AT]

I would have to say that it would be any dual-tone T-bolt. Very sadly, it's a sound that is disappearing from the world with each passing day, fading into the history books. However, those us here on this board will put up a fight to prolong it.

[Robert Gift]

Any siren with a 7/10 configuration, like the HOR.

What are the pitches 7/10 produces, Daniel?
Can you direct me to where you kindly listed all the pitches for all the ratios?
Thank you,

[40V2T22]

2T22, Modulator, ASC 13, SD-10, and WPS-2900, all in wail.

[RedAlpha]

One of those dual tone carters you hear in World War II movies grabs my attention the most.

[kswx29]

I'd have to say the 500AT becasue before they replaced the 500at about a half mile from me...during tornado warnings it was erie sounding...but i also had a Model 5 and 2001 sounding along with it...still erie none the less.

[2001srnfan]

A Cyclone.