This is my boys system. 96 Nissan Extended cab. Added extra battery under the hood, big 3 in 1/0, 1/0 to the extended cab reduced to 4 gauge to the Kenwood 9104d powering 4 Kenwood 12s. Its a 4th order tuned to I don't know what. Outside dimensions are 14x44x27.5 which puts it right at 8cuft gross, 96 sqin of port. It gets very loud for the amount of power. Should have a video soon and maybe numbers too.