hey, i have a 1966 chevy truck with no radio in it right now. im going to buy a cd player and an amp for my sub-woofer. can i connect the power from the cd player and amp directly to the battery? or do i need to have some kinda thing inbetween them? or for the stereo to turn off when the car turns off do i have to wire it to the ignition? any help will be appreciated...i know this isnt a car forum but i imagine somebody knows.