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You could also wire in RCA jacks as well. It is your car.

I hope this has helped you in your quest to add an AUX in on your RX-300.

Note on how to wire it in:

The data flows for the wires that you are splicing are coming from the CD player to the blue connector. The Blue connector goes to the pre-Amp.

Basically looking at the wire diagram for the DPDT switch, you would put the wires from the connector on the left side and the top right add your mp3 and the second set is your CD player.

Here Chris Santaniello added a dual MP3 and Satellite FM rocker switches and mounted the box at the bottom of the console.

That is all there is to It! Enjoy!

If you need help Post your questions here: