i was thinking of getting a box designed for a kicker 12" cvx. im not going to build one myself i was trying to see what would you suggest i do. basically its a honda accord coupe and i have a prefab kicker box but i wanted to know would it make a big/noticable difference if i had a new box put in....i hear about 4th order boxes but are they any good for a box thats going to be located in a trunk or what would you suggest i do?? thank you for your time