I am trying to reuse the internal siren of an old home alarm system in my house (ITI caretaker), which has a 4-wire input (red/green/black/ white). Inside the siren there are two speakers: one looks like a regular speaker; the other looks like the one that would generate high pitch sound. To each speaker there are two input wires connected to it. But my new alarm's control unit only shows 2-wire connection (+12V, INT) to an internal siren. (Online installer manual, page 6 diagram:
Regards, James