fast4door
10+ year member
Team Loud Concepts
Well the reason for the 2" port is because of the velocity of the air coming threw the port, the port would also have to be longer making you have to wrap it around the box. I have tested 2 boxes designed by WinISD and the port noise that the boxes produce is unbarable, I have purchased BassBox Pro and the 4 boxes Ive made using its designs have been so much more accurate then WinISD. About the frequency range, I am assuming he listens to a mix of music ie rock, rap, dance etc... he said he wanted it to be tuned fairly low, so I took in to consideration that most rap songs hit the low notes (ie- get low/liljon= 17 hz). This frequency will keep his subs for over excurshing down to about 15 hz and up to about 96hz. It will be a good daily driver mixed with a little spl... and hey they were free correct, i didnt charge him for me helping out!!