yes ,if you want to have it insured when it gets stolen
No it will not damage sub unless its raining or something.
YES
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.
its the same year round
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.
In the back pointing at back hatch
no they are called accustomass moduals and their way better
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.
ground it to the body of the car floor board
I have represented a company that would rate higher if you were with a sub par insurance company. The thought behind this was that some sub par companies would not report their losses to the Comprehensive Loss Underwriting Exchange so they could not verify if you had any insurance claims.