Question about preamps

Hey- I got a problem
I have a cd player in my car, and it doesn't have a preamp out for a sub. Is there anyway I could hook one up still? Or do I need to by a new deck?

When you made this post there a thread less than 5 down from the top entitled "Subs and Amp to stock radio". You can find it here. (http://www.toyotanation.com/forum/showthread.php?threadid=35956&highlight=modulator)