my car only has 4 inch speackers so my question is how hard would it be to like cut into my door to put in the mid bass and tweeters of a component set and how good would they actually sound. im pretty new to all this so im kinda worried because if i screw up theres no way to fix it. i also thought of buying those prefabed 6x9 speaker boxes and puting those in the back and keep the 4 inches in front. or does anyone know of some amazing 4 inch speakers. i was looking at the infinity kappas. thanks alot oh and i cant do kick panels cuz i have a manual