I came up with a novel way to build a ported box, and thought I'd share it with the forum. This method of building the ported box has a few advantages over a conventional build:
1) It is possible to make the depth very very shallow, without resorting to the use of an expensive 'shallow' subwoofer driver
2) This method of building a vented box makes the baffle more rigid
3) It is easier to build than most horns
4) It is potentially cheaper to build than a conventional ported box. (I'll explain why in a minute.)
Here's a conventional ported box, using a slot port. In this pic, I've made the enclosure very wide and shallow. You might use a box shaped like this for a pickup truck, or for a home theater where you wanted to hide the subwoofer or use it as a false floor.
Here's an example of a ported box shaped like this.
Here's my box.
The change in the box is very simple - I've taken the woofer and I've put it INTO the port. So the woofer is mounted in the port, instead of being mounted to the outside of the subwoofer box itself. By doing this, the depth of the box is about an inch shallower (because the woofer isn't mounted outside.) The box is a little bit cheaper to build, because you don't have to spend money on a grill. If you're using the subwoofer as a false floor or placing it behind a couch, you can push it ALL THE WAY against the wall, because the sound comes out of the SIDE of the box, not the FRONT of the box. The subwoofer baffle is more rigid, because it's bonded to the outside wall. (This assumes that you connect the inner and the outer wall with a brace.)
1) It is possible to make the depth very very shallow, without resorting to the use of an expensive 'shallow' subwoofer driver
2) This method of building a vented box makes the baffle more rigid
3) It is easier to build than most horns
4) It is potentially cheaper to build than a conventional ported box. (I'll explain why in a minute.)

Here's a conventional ported box, using a slot port. In this pic, I've made the enclosure very wide and shallow. You might use a box shaped like this for a pickup truck, or for a home theater where you wanted to hide the subwoofer or use it as a false floor.

Here's an example of a ported box shaped like this.

Here's my box.
The change in the box is very simple - I've taken the woofer and I've put it INTO the port. So the woofer is mounted in the port, instead of being mounted to the outside of the subwoofer box itself. By doing this, the depth of the box is about an inch shallower (because the woofer isn't mounted outside.) The box is a little bit cheaper to build, because you don't have to spend money on a grill. If you're using the subwoofer as a false floor or placing it behind a couch, you can push it ALL THE WAY against the wall, because the sound comes out of the SIDE of the box, not the FRONT of the box. The subwoofer baffle is more rigid, because it's bonded to the outside wall. (This assumes that you connect the inner and the outer wall with a brace.)
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