Audio Systems: what type of box (sealed or ported) should i use for 2 12 mtx thunder 6000, pdf data sheet, model speaker

Question
what type of box should i use for my 2 12 inch mtx 6000s

Answer
http://www.mtx.com/caraudio/products/manualsQuickInstall/subs/T61244A.pdf

The above pdf data sheet shows all the combinations for box type, size of box and frequency response results for the T61244a model.

You did not give me the model number of your speaker so, if you need another model you can find it in the archives section of the support pages at wwww.mtx.com the factory web page.  It is a good reference for you.  You can than choose the box design for your model speaker based on the size of box and the performance you seek to achieve.

Best wishes.