This might be a stupid question but how to you optimize the port volume to the box volume. It appears you can change the port volume as long as the ratio of length to area of the port is the same and keep the tuning. How do you optimize this for the most power output? If the port volume is too small not enough air will be able to move and if it is too big there will not be enough pressure for the driver. I am using your average circular port for this design. Thanks!