Treo Ssx 18"x2

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first queston i bought 2 18"treo ssx subs got a good deal for 500.00 for both almost new and yes they work but my queston is can i run them o 2 saz3000's will they handel this if not i will gain it down i know they are rated at 2500wrms a piece but will it work

second queston on treos website it say 4cubes net apiece so i am building my box to treo's specs and it says 100sqin of port (seems small) do i need to do more say 15 or 150 i dunno plp tell me that more port area =louder and how deep do i make my port to get 31hz tunning treo says 21.5" and the box im building is 10 cubes gross so after dissplacments puts me around 8cubes plz help me so i can build my box heres a pic of one sub http://www.caraudio.com/forum/attachment.p...mp;d=1229308589