Thanks, Wayne! And I assume I should try to lengthen the port to get closer to the size you're using? On the way to work I was thinking my internal volume of the cabinet is going to be even more off because your design has the horn in the cabinet and mine sits on top. I may try to do a bit of cuttin' & drillin' to fit the horn in the cab and reposition the port. Any issue with port on the back if I have to go that route?