You may be thinking why do I need to soundproof my car? I want it to be loud don’t I?
Well, the reason for this is sound is a form of energy; if this energy is escaping from the car then you are not hearing it. Also if you have panels vibrating, then that will be using energy, which could be used for sound.
If you are serious about your system, you should seriously consider installing sound proofing.
How do I soundproof my car?
This is quite simple. All you need to do is cover the surfaces of the car with a soundproofing material. Dynamat is one of the best products on the market, but also the most expensive. To fit it pull up your carpets, door panels boot floor and so on, and just stick it on. You will need to cut holes for speakers and locks.
Installing soundproofing will also increase the quality of sound in your car. For many it would seem as if their speakers have been upgraded.
If you are serious about your system, you should seriously consider installing sound proofing.
Other benefits are that road noise and engine noise will be reduced. A spray is also available to do your engine bay and hard to reach places.