16.75 deep x 13.0 high x 22 wide =2.77228 internal plus .08463 for port space 40.25 port length 29.5288 hz port tune 19 long for first port length minus 1.5 for turn = 20.5 19 long for second port length = 39.5 minus .75 for wood length of front baffle = 40.25 with 3 inches from back wall 16.75 deep internal plus 3 inches internal for port length #1 plus .75 for wood thickness of port = 3.75 plus 16.75 = 20.5 deep.... plus 3 inches internal for second port length plus .75 for wood thickness = 24.25 deep
so it will be 24.25 deep x 14.5 high x 23.5 wide external
your port will be on the side (either side you choose where you have 22 inches length internal)