get a AUX (those red and white plugs) to 3.5mm Audio cable...costs about $7.. just so long as your Stereo has an AUX A/V or any A/V port.
so go to radioshack and ask for "3.5mm audio male to Y Audio male"
to make it easy to controle i would also buy one of those iPod docks with the remote/charger/and 3.5mm plug in the back (they cost like $30) annd booom amazing setup to stereo. hope this helps