there are many cd players u can get to alow u to us a cd changer and 1 or multiple subs with it. like sony or even jvc but most of ur newer name brand cd decks allow them to be used..

It sounds like you want to change to an aftermarket deck, keep your changer, and add a subwoofer. If the changer is a factory CD changer, you likely can't keep it functional and change the deck. You can add a subwoofer to your factory deck by using either a line out converter (L.O.C.) on two speaker channels, and feed the output RCA's to the inputs on an amp, or use a sub amp with High (or line) level inputs. All you need for either of these are the usual components; Amp Subs Box Amp wiring kit Remote wire If you use the High level input option, you'll just need some extra speaker wire to tap into the speaker leads in the car, and run them to the input on the amp. If you use the L.O.C. method, you'll need RCA cables, and a line out converter. The converter is connect to the speaker leads, then RCA cables plug into the box, and run to the inputs on the amp. If you have an aftermarket CD changer (you'll have a little LCD readout with controls and a thick wire). and you have to tune the radio to a set frequency to hear the audio signal, any radio will do. You can use any brand radio with RCA pre-outs, preferrably one with a sub output option. You'll just connect the FM modulator box from the changer to the FM antenna, as it should already be connected, and follow the normal amp install steps.