Airflow_Concepts
CarAudio.com Newbie
Currently restricted to 1.5 cubes per 12-in subwoofer. That is after sub displacement. Using 4-in flared ports. The port is flared at each end. Currently estimated to have 15 to 16 in in of port length and seems to be happy in the 27 to 32 HZ range as the subwoofers have very minimal movement with tons of audible output at those frequencies.