I'm working on a friends 72 Demon with a stock AM radio. The stock speaker in the dash is toast so he wants me to put a pair of 6x9s in the rear deck(which was cut by the PO)just so he can listen to something. I'm wondering what I should look for. I don't want speakers that take a lot of power to drive. Do I want single cone with small magnets? Or can that radio drive something a little better?

Thanks
Arno