I have seen several different opinions about the polyfill topic. Some people say just to stuff it in there like a filler, some say staple it to the sides. Which is the correct way to do it? Thanks for any comments.
If you don't want to glue/staple the stuffings, then what you can do is, use a wire mesh and on any vents/openings on the back of the sub. That way nothing will get "inside" of the sub when it pounds. Your first choice should be glue/staple.
Does the polyfil not have to fill the box evenly? I get the idea that if its stapled to the sides, then it will all be pinned down on the sides and not filling all the empty space.
Cnc, didn't you say you were interested in SQ? If your sub recommends 1-3 cu ft sealed, and your box is 1... technically that's the best for SQ... you might miss out on some lower frequencies and not have quite the SPL you could with a larger box/with polyfill, but if you're looking for SQ... I'd leave your box as is. Most likely since you're already in the optimum zone you won't notice much of a difference anyway.
I did alot of research on this before I did it myself and here is what I did with some pretty amazing results. First, I lined the inside of my box with a layer of edead to reduce vibrations then I used spay adhesive to coat the sides and lined the sides with sheets of polyfill and finally I stuffed my 1.5 cu. ft. box with 1lb. of polyfill. I lost some coloration of sound due to the edead, my sub now plays lower and its much tighter then before I had done anything. Hope this helps
Mikey H
Unregistered guest
Posted on
Actually, the smaller the box, the more "high impact" the sub. If a sub recommends 1-3 ft^3 the closer to 3 ft^3 will flatten the response curve giving better sq and bass freq. response.
Bigger boxes tend to make the sound more boomy and less accurate imo. You do need less power to get the same SPL, and you can achieve lower frequencies however. Both have their advantages, but I like a little bit smaller boxes.
