hi everyone!... i want to change my audio setup, i just wanted to know if i can just swap it out or do i have to do special wiring and such like the older model TL's with their BOSE, have to. basically do i have to do anything extra or special to swap my audio out and add in a sub and speakers? would i need a new deck ... so a navigation system too?... wow $$$

any recommendation for good audio equipment like subs,amps, and speakers... please let me know, i want something that bumps hard but sounds really good NOT something that will bumps and the car breaks down as for price, not something too expensive so good bang for the buck!

ohh yeah i have a 04 3g tl so NO BOSE ... so thanks in advance for any advice and recommendation