Originally Posted by belgiansound
Will adding stuffing to the vent increase its virtual volume as well and solve the issue?
It might "solve" it by drastically cutting down the output, so NO. And the air in the box is like a spring, the air plug in the port like a mass, they are two different things, somewhat like a car on its suspension springs.
- Stuffing the ported box is fine, I like it. DO clear out several port "diameters" inside the box to let the port breathe.
- Nah don't change to circular ports.
- Yes your tuning may come out a bit high, try it and see, port simulations aren't always too exact. You can always graft on an extension, a bit of a pain but not the end of the world. OR, glue in a flat piece to reduce the port height, yes you might lose a bit of flow.
- Per Harman/JBL research, radius those port edges as big as possible (1" roundover bit looks like), and add a flat flange inside (doesn't need to be too strong) so the inside of the port has a "wall" for more symmetric/linear airflow. Maybe extending 4-6" on each side of the port.