what other similar (12″) drivers would be suitable for Open Baffle Dipole
with either cloth treated or rubber surround?
The two 12″ drivers will be driven in parallel (4 Ohms)
with a solid state plate 250 watts amplifier.
The only option for open baffle specific use that has a cloth surround is the LO12. They have more efficiency but low end extension is a little more limited due to the lower travel of the cloth surround. You can still expect to get down in the 35hz range quite nicely though. This can be made in dual 8ohm or dual 16ohm configuration. With the dual 16ohm wire the coils in parallel for 8ohm and drivers in parallel for 4ohm.