hows it goin. my name is caleb sharp. i have a 2007 chevy colorado. i have sum audio experiance i installed my head unit and a set of subs. i have sold my subs since and plan on getting an 18. i have two amps a 1000 kenwood and a 2000 kenwood same series. i need to build a box for the 18. i have room in my ext cab cuz i have no back seats. so im here to contribute and gain knowlege.