Does the basic radio have rear speaker outputs?

Guard Dad

I am sitting in the car right now. I've just completed the install of the illuminated door sills and am about to start on the audio system. I am using the stock head unit because I like the way it integrates into the dash and dumping another $1,000.00 into the audio system is simply not an option. I am installing the Polk speakers and I am also installing an ipod/phone interface (as an audio source only, no phone) that I got from Crutchfield. I have a a nice big package of Dynamat Exterme and I will be covering the hatch area and doors wherever possible. I was interested in the rear speaker outputs because they might be of some use in the future, besides something about not using the full potential of the system irritates me. If I could hook them up to a speaker capable of some better bass that would be cool. Installing a full-on sub system would take up too much room and make the car almost useless for the weekend trips that my wife and I plan to take in the Z. The space under the seats might work for a sub (must be affordable), I count on you guys tell me. Super-high volume is not my goal. I want to get rid of the boomy mid bass of the stock system and improve the highs and low bass. The goal is Sports Car first, audio system second. I am eager for your thoughts.