ok so i just did my first 4th order. im only doing a 149 at the head rest but that is at 27 hrtz....lol i have 2 dc xl 18s and a soundstream xxx 10000d amp. plenty of batt power. the subs are in a 8.5 cube sealed box firing to the side into a 16 cube ported box. the ports are 2 8inch flared ports. i have 38 inchs of width available. 28 heigh and 50 depth and thats to leave just enough room for all my equipment to fit. look at the pics and tell me what you would do diffrent to get a higher score say maybe a 152 out of it.
basic of the box
the ports front view
looking into the ports
and the back just for looking =]