hello everyone. i'm very inexperienced when it comes to adding mods to my car. my first project will be adding an aftermarket 12" sub and amp to my 2000 TL. i was hoping someone could take the time to provide step by step instructions on how to do this or at least answer a few questions:
do i have to remove my factory head unit?
if so, how and why?
what do i use as the power source for the amp? do i just connect it directly to the battery?
would you recommend running both the factory sub with an aftermarket one?
any help would be greatly appreciated. thanks.

 

If you do a search; you will find many answers to your question.
I added an amp and subwoofer to my existing unit. I did not disconnect any of the speakers and I think it sounds great.
I had a shop do the install since it was free with the purchase of the Kicker Amp and Kicker Comp sub.