Designing my Ported box, info

[bondj0007 10+ year member]

i am going to build a ported box for a single 12" pioneer sub (dual 2ohm, 400WRMS):

http://www.pioneer.eu/eur/products/25/130/201/TS-W307D2/index.html

powered by kenwood amp (300wrms):

http://www.kenwood-electronics.co.uk/products/car/amplifiers/KAC-6203/details/

now i need to design the box ill build.

*** 1st of all, is this sub adequate to do it ported?

*** if yes i was wondering if the port position (left,right,bottom,etc) will do a difference?

*** pioneer site says that they do the following encl for it (but its sealed?!?!):

http://www.pioneer.eu/eur/products/25/38/301/UD-W301S/index.html

basically after searching the web, i need to know what information about this sub should i find (from where??) in order to identify the specs of the enclosure and port/vent??

i was considering doing something like this design (but for my specs!):

http://www.mobilesoundworks.com/images/2_0msw112.jpg

also, i listed to broad music but moslty electronic music and dance, so how would i figure out to which freq i tune it? and should i allow some hz difference since i read that in reality it will go lower than the designed freq???

i really need some guidlines to start this since im not experienced

thanks alot

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