here are two videos. The first is a t-128. The second is a federal signal 2001. IN the background of the 2001 video you can hear some new whelen vortex sirens. At the end of the video you can hear a t-128 and a p50! Please excuse me freaking out to film behind me.
http://www.vidilife.com/index.cfm?f=med ... C&action=1
http://www.vidilife.com/index.cfm?f=med ... CC2-9F3D-C