Now here is a good comparison which siren do you think will grab you're attention? The F.S. 2001 or the ASC T-128. I have to go with the T-128.
F.S. 2001 in attack mode.
http://www.youtube.com/watch?v=zojQVBk3 ... playnext=1
ASC T-128 in attack mode.
http://www.youtube.com/watch?v=Yaie4Z878zo
I think the T-128 has a more urgent and "hey there is something wrong take cover" sound to it.