Alright, I have a Chevy s10 extended cab, my friend has a Ford ranger ext cab with one audiobhan 15'', sealed box with 400 rockford watts going to it. Its acually a pretty chitty sub, but it gets the job done, right. So my question is, how can a put one 10'' in my truck to have a better "system" than his. I don't really need to be that much louder than him, but I want it to sound GOOD. really low and tight if possible from a 10. Im not gunna say a sq sub because I really don't know what that would mean. I have looked at the Fi Q10 with a Hifonics amp. Would this do it? Or could I go a little smaller with something like a Soundspliter or AA? The box would be custom built by me. It has to be 1ft^3 or less because of space restrictions. Probably sealed as i dont really now how to built a ported box. A classic Chevy vs. Ford battle! Thanks for you input.