i know how to make the exterior of the box, but is there any walls or anything supposed to be on the inside of it? and for a port hole, do i just put a hole in the box, or put in a sheet of wood to tunnel tha bass up and out the hole?

 

I have no idea what the hell you're asking about the walls, but before you go building a ported box, you need to learn about what a ported box consists of. If you just cut a hole in a box and slap a sub or 2 in there, it's going to sound like a sped kid beating on the skull of a classmate.

Box volume is very important. When using a ported enclosure, it's even MORE important than in a sealed application. The port volume is also crutial, because the port volume determines what frequency the port energy is concentrated at. These two parameters need to be well matched to the driver in order to get a clean, smooth frequency response.

Basically, if this is your first box, I'd try to discourage you from building a ported box. Sealed boxes are much more forgiving and easier to get decent on your first try. if you're hell-bent on building a ported box, the quickest and easiest way to get the right box volume and port size numbers is to contact the manufacturer of the subwoofer for their reccomendations.

Another problem is that space is at a premium in a thirdgen, and generally ported enclosures use a larger volume than a sealed box for the same sub. Then you have to allow for the port volume inside the box, as well as figure out how to route the ports in a configuration that won't interfere with the sub or any walls. It's a handful.

 

okay i'll make a sealed box then. but the question i am asking is "is the box completely hollow? (nothing inside?)

 

some people choose to stuff it with poly fill, but otherwise, yeah. You know, unless you need somewhere to hide a body, but if you do that, just make sure you work its volume into the calculations.

 

Some people use a divider wall. It's pretty much just a board on the inside of the box that is sealed so each sub has it's own sealed chamber to perform in. Helps keep the subs seperate (one might hit a little harder than the other). Also in the case that you do blow one sub you can still use the other because it's still in it's specific air space it needs. The divider also serves another purpose it helps reinforce the sides of the box hopefully preventing the walls from moving.

Poly fill can be bought at WalMart.

Depending on the subs you might want to add bracing to the box. You should check with the manufactor. They often provide tips for building boxes on their websites.

 

I think he wants to know if there should be baffles in the box. NO.