- Jun 20, 1999
My sub box's internal dimensions are 13x23x22.5", which is 3.89 cubic ft. The port is 4" in diameter x 17" long, which is .12 cubic ft. The amp I will be getting (PE 250) is 9x9x2.5" (actually 3.25" deep, but subtract .75" for the thickness of the box's rear panel), which displaces .11 cubic ft. Now, I haven't decided exactly which 12" driver to use, but I assume it too will take up approx. .12 cubic ft. My first question is, do all these calculations look correct up to now? Second, I'm sure that I must subtract the space taken up by the driver and amp, but must the volume of the port also be subtracted from the raw internal volume of the box? If so, the actual internal volume of my box when it is completed (driver and amp installed) should be 3.54 cubic ft, correct? Now, I had planned on using the Shiva, but I am also considering the Dayton Titanic and the SVS ISD. Which would work best in this box?