Clifford Siren - Simple question

Is it possible to do this? I need to know how the Clifford siren works. Its multitone so I'm not sure how it really works. With the two wires that go into it, is it as simple as a (+) and (-) wire?

I want to hook up a relay to drive the siren seperate from the alarm head unit. What I'm trying to do is set it up to use as a warn away instead of putting in a Piezo siren.  Is this possible?

On the relay, I would hook up the 85 to the warn away (-) output from the sensor, 87 to a 12v (+) or ground (not sure, depends on the siren), 30 would go to the siren itself, and 86 would goto a 12v (+)

Please let me know if this is possible. Thanks!