[morzh]

Tony

I would also recommend a perm speaker and a divider but then Patrick said he wants a Field Coil type, though I am not sure I understand "closely match to the other two speakers" part. Speaker is an acoustic transducer and the way you make the magnet, perm or electromagnet, is not necessarily super-important. However if this is a firm decision, then we have to work within the frame of the owner's desires
Which means either speaker and another resistor (or two resistors in series) or a speaker and two resistors in parallel. I think the former though.

Myself I would go with a perm. Let alone the fact one could by perm speaker way, way cheaper than a good FC one.