Adding a 15" subwoofer is going to take a decent size amplifier, which in turn would require the adequate amount of power to be driven from your alternator. Big sound, usually requires some modification, but replacing the alternator may not be needed, right away. Basically the alternator is there to drive the electronics that are already in the vehicle right now from the factory so there is a chance you'll need to make this happen, and there is a chance that you may never have too, it all depends on how your car is functioning after adding in the equipment.
Head to your local Best Buy to speak with a Blue Shirt, or a Geek Squad Autotech to pick out the products that would fit best in your vehicle. If you have installation pricing or questions after your visit know that I'll be here ready to help out! If you're needing assistance with the differences in the product hit me up, but the store should be able to provide you with all the parts and labor, and the many different products we carry instore and online that would work best for your vehicle!
Here to help you narrow it down after you've spoken with the experts in the store for your product!
I am a CAR Geek Squad Autotech, but the views that I post are my own and not that of Best Buy.
***Know that I am not able to issue official responses and that my posts are only here to help before an official response is offered by a Best Buy Social Media Specialist***
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