I was looking at this today and even though ASC came in low bidder, they still chose ATI for the siren upgrade. More proof that ATI management can pull a vacuum on an onion sack.
http://www.sedgwickcounty.org/purchasin ... 102011.pdf
Says that 153 of the old sirens will be kept in place, 8 new ones will be installed, and 15 sirens will be deleted. The ATI model they are using is the Viper 3200.
At least most of the old sirens will remain. They will need them to take up the slack from those new POS's they are installing.