I need porting recomendations for my sub?

Question

it's probably about 1 and a half cubic feet and it's behind my truck seat with a 10" pioneer. should i port it? i'm using a rockford 250 watt amp and the subs max power is 600 if that matters.

Answer 1

You can't just "port" a box. It must be built for the sub. Ported enclosures are bigger than sealed for the same sub.



Porting also requires some math....



Port tube length calculations for round ports:



input = Radius of Port (R), tuning frequency in Hz (fb), Volume of the box in cubic inches (Vb), (L) will be the resulting length of tube.



L = (1.463 X 10^7 X R^2 / (fb^2) X Vb) - 1.463 X R





For square vents, where the area of the vent, V, is in square inches, and the peak volume displacement of the cone, D, is in cubic inches:



V >= 0.02032 * fb * D



or



L = (1.463 X 10^7 X (h*w/pi) / (fb^2) X Vb) - 1.463 X (h*w/pi) ^0.5



witha ratio of 1:8 to height vs. width



To reduce port noise, round off any sharp edges.

Answer 2

I've been doing car audio for over ten years. Never heard of a breather hole. The whole point of an enclosure is to create a volume of air that helps control the movement of the woofer. Cutting a hole in it makes no sense. Unless your installer is meaning to say a "port." Read the manual that came with your subwoofer.

Answer 3

since its not in a trunk its not gonna work how its suppose 2 so leave it air tight.