Wayne Parham Messages: 18752 Registered: January 2001
Illuminati (33rd Degree)
If you really crank those subs up, the airflow through the ports will increase and things nearby might cause an obstruction. But if you're not really pushing them hard, airspeed won't get high enough to matter.
Put a sheet of cardboard where your nearest obstruction is. If the cardboard flutters from port airflow, then consider moving the obstruction. If it doesn't, don't worry about it.