Speaker box questions

[wjfawb0]

The MDF (multi density fiberboard) is packed together small wood particles. The structure makes it more sound deadening. It doesn't resonate as easily as plywood. Plywood is larger chunks and flakes of wood which can resonate more easily. When I first started building boxes, I used plywood, cause I had a bunch. The boxes sounded bad. Rattled, vibrated buzzed when pushing lots of bass. The MDF sounds deeper and is quieter. Also, pack about 1 lb of polyfil (polyester in bags at wal-mart in crafts section) per cubic foot of your box. This deepens the sound by changing the medium inside the box. Makes the box seem bigger than it is. Leaks, like old, unplugged screw holes in boxes and leaky jopints also degrade sound quality. I always use some type of rtv or silicone caulk to seal all the joints of my boxes. These things can really improve the sound of a sub box.
-wjfawb0