What kind of car subwoofers will you choose? There are various brands and many different types and sizes to choose from when it comes to car subwoofers, and usually can be separated into powered woofers or passive woofers. So you have to pick the one that suits you. The powered subwoofers have a built in amplifier, that allow it to deliver a better sound compared to a passive ones which are driven by the car amplifiers. You can find subwoofers ranging in size from 6 inches up to 18 inches in diameter from automotive aftermarket. But do remember to choose the size according to your preference and the placement of the subwoofer. Beside you should check if the car subwoofers you prefer to are matched with your car stereo system to give the best output.We would load up our van full of window tint and head out to several jobs each day. Our territory covered most of the Los angeles area so we probably drove 150 miles a day! I was making 0 a week for 5 days of work in 1978. That’s the equivalent to 25 a week in 2004!!Undercoating has two advantages. First and foremost, it will protect a card by preventing the rust that eats through a fender and through a car body. Secondly, sprayed or brushed into metal to metal cracks and crevices the black asphalt material will forestall many a squeak and rattle.