Polyester Fiber Stuffing

Yes the poly fill can help in many situations. I used it inside factory speaker boxes, my sub box (its small in a jeep) and inside the foam baffles of my dash speakers.

If you have a cover on the back of the speaker the poly fill will not be effective, so no you don't need it.

Yes I think adding some Poly-Fill would be a good way to squeeze a little better performance out of that undersized enclosure.

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I don't think adding poly inside will help your volume shortfall, that's not what it is for. What you might do is port the box so its not sealed, that way the subs are not starving for air.

1 pound of poly fill honestly might not even fit in a 1.9 cubic foot box. It won't make that much of a drastic difference, but it will help a little bit.

The stuffing does not increase air space. So no this will not make the box bigger from .9 cuft to 1 or 1.5 cuft. This is best to help reverberating sound waves be knocked down, so to speak, helping the clarity of the sound. Your best bet is to find a speaker that fits the available air space (0.9 cuft) condition

Hi Charles, This is one of those cheap things to just try and see how it works. Poly is used in smaller boxes when the speaker requires more volume.

Yes it'll make the sub feel as if it has more airspace

It worked great and made a world of difference with my 15's

Using the fiber stuffing will make the sub think it is in a larger box, and that should make up for the smaller box dimensions you actually have.

Yes it will. You're not going to pack it super tight. It comes in an almost 1 cubic box. When filling you want a consistency of wimpy pillow. You are essentially creating a denser air space inside the the box which causes the inward speaker excursion to be tighter and then the outward movement is freer causing the bass sound wave to explode. Just be sure it is truly a sealed box and not a ported box. I have even used foam gaskets between the speaker and box. The sealed box gives a more natural bass sound than a ported one which is muffled.

It's the same stuff

I do believe that it is a denser material but thought the same thing when I saw the similar material in a craft store. This product did work very well though but you may want to play with the amount of material you use in the subwoofer cabinet to get the right sound before you seal it shut. Hope this helps

Wouldn't know cause I've never used the stuff from the craft store.

I used the Polly fill behind 5x7 speakers in my motor home and it works great.

It certainly wouldn't hurt! Give it a try listen and if you like it, than your done. If not you can always pull the Polly fill back out.

It won't hurt anything to try it. It's possible you could get better tone out of the low end.

When you add polyfill you are tricking the sub into thinking it's in a larger enclosure by slowing the rear waves . It's not used to make enclosure smaller. Hope this helps

I'm not sure it makes a big box smaller, It makes a small box seem bigger. Please ask one of the techs they should know for sure.

Well that is not technically how it works. Polyfill just makes it seem like that there is more air in a box. In order to accomodate for the necessary amount the sub requires. So the answer is a no. Keep looking for a box or switch to a different pair of subs that closely match a box.

The Polyfil is made of Polyester which is not flammable and does not ignite easily. I hope that helps. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=5

Hi I'm Alan I myself think the stuffing helps make the box not sound hallow or vibrate the box. When you us use the stuffing fluff the stuffing in the box once you have ran the wires to the out side inputs. In general the stuffing makes the bass sound just a bit hard because the subwoofer has back pressure.

I've put Poly stuffing in every sealed sub box I've had. Doing so will make your sub perform as if it were in a bigger box. I've found that in sealed applications it produces a harder/punchy/accurate response at the bottom of the frequency range, not necessarily louder. Hope this helps.

If you want to use speaker baffling, this is a much better material than fiberglass. Small pieces won't break off that can enter your speaker. That said, adding this material won't make the sound any louder. It typically is used to smooth out the lower frequencies so the music is more natural sounding and less 'boxy or boomy.' Don't stuff the box tight. Use a small amount, pull it to fluff it out, and very loosely fill the enclosure. The effect is more noticeable with larger enclosures with woofers, but even in a smaller box it can make the sound more natural. Hope this helps. Allen

I forwarded your question to an Advisor and they responded with the following: I'd get 2 packs. You may end up with a little left, but this should be sufficient. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat.

It works fine in a ported box.

Unlikely to come out the port. Not sure stuffing works well in a ported box though.

If you fill the enclosure with stuffing, it should not move. I should also make sure you fill around the port and not inside of it.

Just stuff the correct amount in the box.

Just stuff it in

Stuff it! What size box are you using? Used it in a compact box with a 12" Kicker.

David, Personally, I did my best to increase the thickness of the stuffing by lightly pulling on it from different directions. Once it was fluffed up, I gently put into the enclosure trying to not to pack it down and loosely filling the inside of the enclosure. You want the sound waves from the woofer to be slow down as it passes through the fibers. If the fiber is packed to tight it will act more like a wall and part of the sound wave could be bounced back to the backside of the woofer casing distortion and possible reduce the life of the woofer. If the enclosure will be moving around, you might want to spray the inside of the enclosure with Spray Mount or some other types of spray adhesives. To keep the fibers from shifting around. I hope this helps.