I recently purchased a 2005 Civic 'reverb' which has this silver clarion looking 6 disk in-dash mp3 player and upgraded premium sound package.. it actually sounds decent for a stock system, but it is missing some low end. I would like to add a subwoofer, however I'm guessing this stock cd player does not have a rca output... would I be correct in assuming this?

I'd like to add a sub and amp without changing the stock deck. If it does not have RCA outputs, what options do I have other then high level inputs? I don't want to amplify the entire system, just add a sub.

Thanks for your time.