If the speakers have built in amps, then I assume they use a 1/8" stereo mini plug as an input. If that's the case, then you should be able to easily get an adapter cable with that mini plug on one end and a pair of RCA connectors on te other end. The RCA connectors would go to the red/white plugs on the player and the mini jack goes to the speakers input.
Check out your friendly neighborhood Radio Shack for this. If you're not in a hurry, then
http://www.partsexpress.com has these also.
If your speaks don't have built in amps then you're screwed. You'll need either an amp or a receiver.
