Audio Systems: audio, voice coils, power amps

Question
what size amp do i use for my 200w duel 2 ohms cv mobile speakers?

Answer
Any amp that supports 1 ohm loads.  Or, if you wire the voice coils in series that would be 4 ohms and you can then use an amp that only supports 4 ohms and higher.

Most Class D switching type power amps will support the voice coils in parallel for 1 ohm.

Good Luck.