Long time lurker first time poster. I recently aquired 2 CSS SD12 drivers that I would like to build an enclosure for. I'm not looking for max spl as much as capable of low freqeuencies. I would like to keep it around 8 cubic foot internal, ported for a 15 hz or lower tune. I have downloaded WinISD pro but am not comfortable enough with my skills with it to try and design a dual driver ported cabinet. I've searched and can't seem to find what I'm looking for in a tried and true design. Any help would be greatly appreciated.