I'd like to know the winding directions of the voice coils in a dual voice coil speaker and how to connect a stereo output to a single dual voice coil speaker. Is it just like a transformer with a center tap for ground and left and right would go to either ends? Is it two voice coils together wound in the same direction with the common center for ground and left and right goes to either of both other ends? The important thing for me is that left and right do not cancel and reduce the volume.