if my math is right it should be between 34-36hz, narrowing the port width to 3" allowed the port to get much shorter then when I had it at 4" wide, my worry is the port area is too small and will result in a port velocity that is too high.
My other concern is over the orientation of the sub, never heard a down firing sub in a car before.
stevemeadedesigns.com
So what is the tuning? With a port that short I can't imagine it is very low.
if my math is right it should be between 34-36hz, narrowing the port width to 3" allowed the port to get much shorter then when I had it at 4" wide, my worry is the port area is too small and will result in a port velocity that is too high.
My other concern is over the orientation of the sub, never heard a down firing sub in a car before.