This isn't a polk question, so i apologize for posting this here. I didn't know where else to turn to, and would greatly appreciate your help.
I am designing a ported custom enclosure for 2 Fusion PowerPlants fpw-1200's.
Here are the specs for 2 subs:
Internal volume = 3.46 ft3
Port Dimensions = (2 Ports) 4" x 16.8"
Port Frequency = 30.1 (in car)
The port length at 16.8"/sub is a bit long. I was wondering how long would i make the ports if I was to put in 4 - 4" ports?