hello everyone ,well im biulding my woofer box on this long weekend ..i have a litte bit of questions ..well im biulding a 3.5 cu ft vented.. but I don't understand this .. the air space should be at 3.7 cu ft, so is that means that I have to make my box in the dimension that equals to 3.7cuft... also it has two port holes 4"in by 11" and after the speaker displacement and port displacement the total volume is 3.5cuft ?should I convert my round ports to square one.? well I hope this info helps..!
thanks and happy thanksgiving to everyone !!!