hey guys

i intend on building 2 boxes one sealed @ 14x14x17.5 (4sure measurments)

and one ported 30Wx13.5Hx14.5D giving me 2cf @ 34Hz (sound good)

and is there a difference bewteen the slot port and the round port with this sub

Round port and slot port are no different. You need slightly less port area when using round ports because of the reduction in friction.

As stated, you won't need as much port area with a round port, and it should go without saying that of course the port length specification will vary depending on your port diameter/area and enclosure volume.. but I'm going to say it anyway!

Sound-wise, either a slot or round port will work just fine.

I like the slot ports better, they just look tite y0!