What do you mean, "surround info"?
I have surround channels which use a hafler circuit. My question is the following:
does polk use some sort of version of the Hafler Circuit via the IC and the SDA drivers?
Yes it is pretty much the same as the hafler circuit in that is uses the "Difference signal" culled from the positive terminals of both channels, (through the IC wire) but differs in that it places the surround speakers (SDA effect speakers in Polks case) a designated spacing from the main drivers, and employs a low pass filter of approximately 150 Hz, to allow the SDA effect speakers to reproduce bass in addition to the Primary drivers.
Therefore it is very similar but merely different in implementation.
Instead of rear "Surround" speakers, the polks place them next to the main drivers to create a wider pseudo soundstage, as where the Hafler circuit creates a pseudo surround sound and a larger overall room image to the rear mostly.