The purpose of sound deadening a vehicle with a system in it is threefold: Keep the good sound in, keep the bad sounds (road noise, etc.) out, and prevent parts of the car from buzzing or rattling from the lower notes produced by the system. How does sound deadening work? Simple. It works simply by applying mass. If you have a panel that buzzes annoyingly after you've installed your shiny new mega-watt system, throw some sound deadening material on it to add mass. It will stop buzzing and make the the offending metal sonically "dead". I did this to the entire car. I installed Ten rolls of Quik-Fix "Gutter repair tape". The material is aluminum-backed, sticky, and almost as thick as Dynamat regular, or similar products used to deaden noise. I've tested some of this on a metal panel, and it does work at a fraction of the cost of regular sound deadening materials. All ten rolls cost One hundred and Thirty dollars, and took about eight hours to install. It will allow for a quieter ride, and a better sonic experience.
Driver's door done
The rear hatch area done.
The main 1/0 gauge power wire exiting the firewall on it's way to the battery behind the PCM.
The system ground underneath the rear sail panel speaker locations. Contact area was sanded, and then greased.
The main power and ground wires terminate under what used to be a hatch speaker. Both power & ground are split up into four 8 gauge wires each, and delivered to the four amps. The fiberglass tub they're sitting in was sprayed the same pewter color as the car.