I’m just waiting for one more package to arrive which is the Dynamat Extreme. It is a material to be used in the door and roof lining to absorb all vibrations, lost sound, or any distortions through the material. Its a performance sound deadening material which will help the sound of the speakers be precise in their distribution. It is really imporant, and almost everyone forgets to add it when modifying the sound system. I have used it twice before and everytime it cleans up the sound within the vehicle.