I am about to have my JVC DCD player in my dash. I have the Boston Accoustic system in my Commander now. Where is the stock amp located? Also when they install my deck will the powered factory system still work or does the new deck power the speakers or do they work together. If I replace the Bostons does the factory amp work with the new speakers or am I back to the deck just doing the work. I am just trying to see how this system works. Any help would be appreciated and thanks in advance.