I just made the leap from my 06 to a 2010. I have the Media center 730N head with the 9/speaker W/sub. I just ordered a JL Audio J2-500.1 Amp & (2) 10" JL sub's. Were do I need to get the input to the amp from? Can I get it from the factory sub or is it amped? I've looked for about 6 hr's and cant find a direct answer on what to do. Thanks for the help !!!