its the same year round
YES
Cant you need a amp or you will blow the battery
No it will not damage sub unless its raining or something.
Depends on what you mean by stock system
Automobile speakers and sub-woofers (loudspeakers) are not that difficult to locate. Some box stores like Walmart and Best Buy carry a good range of automobile speakers and sub-woofers.
Information about Rockford Fosgate sub-woofers can be found online from many different resources. The most reliable is the official Rockford Fosgate website that offers detailed information on their sub-woofers.
200 watts
Best Buy and other electronics retailers stock Pioneer sub woofers. The can also be found at Amazon and other electronics retailers on the internet such as Overstock.
That's too vague of a question. Sub woofers are sub woofers, and wiring them is all a matter of taking the time to do so. If you meant speakers, like the 16in. speakers custom fitted to some cars, that would be an entirely different story. However, sub woofers wire the same no matter the make. Just make sure you have the proper size amp and your good to go.
One can purchase car speakers and sub woofers from most car accessories stores including Halfords. They can also be purchased online at Argos and Amazon.
No, but it is nice if you want to play loud music.
no they are called accustomass moduals and their way better