well atleast here in PR thats what almost everyone buys. they dont sound bad, in fact my subs punch really hard. here they sell these ones and octagonal ones
these are really cheap boxes...they only cost bout 20 to 30 bucks and they are made from 1/2 mdf to 3/4...i havnt tried putting them facing each other will try it when i get more speaker wire
ohh okkk well i once tryed it facing the trunk door but it didnt sound too deep. ill have to try puting them up to see what happens...