Car Sound System Installation Car Sound System Questions?

Car Sound System questions? - car sound system installation

OK In thinking to the sounds in my car and I know nothing about it, the more you have a subwoofer, amp, box, cables and a bridge.

What I know is, how the cable / cable cost and how much is needed?
the number of cables connected to the camera, the subs?
Cable amplifiers are connected to the deck of the subwoofer is not it?
I have also learned that I keep the amp installation kit must, to the bank so you successfully install the sound system in my car, I need to actually buy?

Thanks