Polk Audio C-4 subwoofer port dimensions?
I recently picked up a Polk C-4 subwoofer system but it is missing the port tubes. I was wondering if anyone had the dimensions, inside diameter and length, of the port tubes so I can get this system sounding correct. From an inside picture and some scaling, it looks like they are about 5" long and 3" OD, but I'd really like an exact measurement.
Post edited by WhiteLX on