Let said I got a subwoofer that require 1-2 cubic feet volume in a seal box and the box that I using is only .65 cubic feet. Will stuffing this fiber-fill helps it performance?

Got this from crutchfield.com
The sound wave coming off the back of your subwoofer reacts with the air contained in the box. Poly-Fill stuffing slows down sound waves inside the box, making the subwoofer perform as if the box were bigger. Use 1 to 1-1/2 pounds of Poly-Fill per cubic foot of box volume.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by special_edition &raquo;</TD></TR><TR><TD CLASS="quote">
The sound wave coming off the back of your subwoofer reacts with the air contained in the box. Poly-Fill stuffing slows down sound waves inside the box, making the subwoofer perform as if the box were bigger. Use 1 to 1-1/2 pounds of Poly-Fill per cubic foot of box volume. </TD></TR></TABLE>

this doesn't sound too good to me, if you're stuffing the box with poly, it will slow down the waves, and due to lack of space/air, the waves wouldnt be able to travel much, would they?
The question is, what "type" of performance you are looking for?

if you are looking for deepness in the bass, i do believe your basswould be deeper, but it doesn't sound promising to increase the bass volume/level, it may actually decrease this, due to lack of space for waves to bounce off of.

 

it really depends. In cost cases, it helps, in others, it doesn't.

Polyfill will gain, if any, in a larger box than a smaller box.

.65 cubes with polyfill will probably be equivalent to a .75 cubic feet box. That that big of an increase. But since polyfill is only $2 per bag (1lb), why not try it?

 

You are not going to get much more then a 10% gain in box "volume" by adding polyfill....you can't just keep adding it to make the box appear twice as large...

 

I've got a semi-related question. I've got some of those foam speaker protectors that I put behind my 6 1/2s. Would it help anything if i stuffed the foam protector with polyfill? (like would it help with vibration or anything?)

 

vibration can happen two ways:

1. one thing hitting another
2. resonating

adding polyfill to the 6.5" wouldn't do much, if anything at all. Polyfill tends to work better in larger areas, assuming it does work for the situation in the first place.

If there is something vibrating, as in one thing hitting another, put something in between the contacting objects to stop the vibration. If it's resonating, to get rid of it, or reduce, you'll want to add mass to the panel (example), to lower the resonant freq. Add mass to anything and the resonant freq will go down. Same with subwoofers, add mass to the cone and you'll resonant lower (assuming the suspension can handle the mass)

 

thanks, i've been wondering that for awhile. i can already tell that i'm going to be spending a lot of time here...

 

lets say the polyfil touches the speaker connections + and - does this stuff conduct? or would it get hot (fire) if it touched a certain part of the speaker?

 

"Polyfill"

what is this and where do i get it?

 

at home depot

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by special_edition &raquo;</TD></TR><TR><TD CLASS="quote">Let said I got a subwoofer that require 1-2 cubic feet volume in a seal box and the box that I using is only .65 cubic feet. Will stuffing this fiber-fill helps it performance?

Got this from crutchfield.com
The sound wave coming off the back of your subwoofer reacts with the air contained in the box. Poly-Fill stuffing slows down sound waves inside the box, making the subwoofer perform as if the box were bigger. Use 1 to 1-1/2 pounds of Poly-Fill per cubic foot of box volume. </TD></TR></TABLE>Yes it will help, but..........<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rcurley55 &raquo;</TD></TR><TR><TD CLASS="quote">You are not going to get much more then a 10% gain in box "volume" by adding polyfill....you can't just keep adding it to make the box appear twice as large...</TD></TR></TABLE> Ditto that
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CooBlueDAB &raquo;</TD></TR><TR><TD CLASS="quote">lets say the polyfil touches the speaker connections + and - does this stuff conduct? or would it get hot (fire) if it touched a certain part of the speaker?</TD></TR></TABLE> No it does not and will not. 94

 

few, good, then I will stuff my box a little more.. only thing is, Kenwood says I need like .68CF total, so add in the speaker, that makes the required box space say... .89CF? Im using a 1.2 CF box lol Sometime Ill make a smaller one, but I do not have the equipment or anything right now lol..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CooBlueDAB &raquo;</TD></TR><TR><TD CLASS="quote">few, good, then I will stuff my box a little more.. only thing is, Kenwood says I need like .68CF total, so add in the speaker, that makes the required box space say... .89CF? Im using a 1.2 CF box lol Sometime Ill make a smaller one, but I do not have the equipment or anything right now lol..</TD></TR></TABLE>Just use up the diff. with bracing inside the box 94

 

wow.. Duh.. im stupid... I could grab a few bars of wood or something, and just use a good glue, or reallly short screws to not puncture the box in case I wanted to keep it...

Thanks dude...

OOO could I putwood in it loose, to test the difference?

loose, but where I would mount it that is

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CooBlueDAB &raquo;</TD></TR><TR><TD CLASS="quote">wow.. Duh.. im stupid... I could grab a few bars of wood or something, and just use a good glue, or reallly short screws to not puncture the box in case I wanted to keep it...

Thanks dude...

OOO could I putwood in it loose, to test the difference?

loose, but where I would mount it that is</TD></TR></TABLE>You could, but it would probably bounce around 94

 

Duct tape is my friend.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CooBlueDAB &raquo;</TD></TR><TR><TD CLASS="quote">Duct tape is my friend.</TD></TR></TABLE> Duct tape is every installers friend. 94

 

yes it does deepen the bass but if your box is ported you will need to put something to cover the holes mesh works good