Wayne Parham Messages: 18778 Registered: January 2001
Illuminati (33rd Degree)
Port length should be measured from entrance to exit, no matter what you've done with the baffle. So if the baffle is 3/4", then a 10" port should extend 9.25" back from it. If the baffle is 1.5", the port should extend back 8.5" back. Overall length - entrance to exit - should be 10".