I have been trying to design a subwoofer box, but I don't understand the the vents. If the vent dimensions have to be 12" x 1.25", do I just leave a hole that size in the enclosure, or do I have to make a tunnel back into the enclosure?

Also, if I got a subwoofer that is rated to hit 20hz, and have a box that's rated at 32hz, does that mean it can't hit that low or it just wont sound as good?

Thanks

 

Vent = Port so you would need to put a 1.25" inside diameter port that's 12" long in the enclosure. You can use pre-made ports or pvc pipe if it's the right size.

Your subwoofer is supposed to be good to 20 hz, if the enclosure is tuned (or ported) to 32 hz that's the frequency that get's the loudest and most boost (because of the port tuning)

Anything below 32 hz will be wasted and/or distorted.

My advice would be to build a traditional sealed enclosure, ported enclosures have to be dead-on with the airspace / port calculations.

If your not sure what your doing you can damage your speakers or end up with something that sounds bad.

But if your dead set on ported enclosures, check out some of the pre-fabs on the market. Find out if it will work with your woofers parameters. If it will I would do that instead.

 

Ok hat makes sense. I want to make a ported enclosure because I already have two sealed subs and I want to get the best of both worlds. One more question though. Does the volume of the subwoofer box include the port volume or not?