Okay, i'm a little confused here.
I would like to use wool as stuffing for my Speakers ( they require 100% stuffing) BUT i have no eye deer where to buy wool from, any aussies know?. Can i use this Material for 100% stuffing or is it only good for damping?
how cheap are pillows? could their stuffing be used
so what's the difference, between stuffing / damping? me thinkis it's the same thing😀
is there anything else acceptable for stuffing? enclosure size is 20Lt for four surrounds and 40Lt for centre,
need some guidance here, please help
thanks in advance!
Alex
I would like to use wool as stuffing for my Speakers ( they require 100% stuffing) BUT i have no eye deer where to buy wool from, any aussies know?. Can i use this Material for 100% stuffing or is it only good for damping?
how cheap are pillows? could their stuffing be used
so what's the difference, between stuffing / damping? me thinkis it's the same thing😀
is there anything else acceptable for stuffing? enclosure size is 20Lt for four surrounds and 40Lt for centre,
need some guidance here, please help
thanks in advance!
Alex
You may use long haired wool, fiberglass insulation, or dacron "pillow" stuffing.
People have there opinions as to which is most effective. All are not agreed.
James
People have there opinions as to which is most effective. All are not agreed.
James
Ummm.... lol.... Just shove a hole sheep in your speaker box... the volume will be reduced for a while, but when the sheep dies and rots, the volume will increase again.. 😀
Alex,
The stuffing in a closed box can increase the box compliance by as much as 15% or more, but that would be the maximum using long fiber wool optimally placed in the box. Fiberglass will be less, and Dacron even less. The downside is they are just the opposite in order of ease of use and availability.
Rodd Yamashita
The stuffing in a closed box can increase the box compliance by as much as 15% or more, but that would be the maximum using long fiber wool optimally placed in the box. Fiberglass will be less, and Dacron even less. The downside is they are just the opposite in order of ease of use and availability.
Rodd Yamashita
If you use long fibre wool, you must support it with netting or similar, otherwise it will settle over time as the fibres are not as stiff as man made materials.
If you can't get long fibred wool, then I would suggest fibreglass insulation, teased out a little, but wear gloves and a mask when working with it, it is nasty stuff!
If you can't get long fibred wool, then I would suggest fibreglass insulation, teased out a little, but wear gloves and a mask when working with it, it is nasty stuff!
Reply
Some expensive boxes use ,special damping foam,such as the Mackie c300,which the box is made out polyproplene and poly carbonate.
The high quality foam is usually polyester waffle-shaped foam,bonded to a melamine resin base.
The very cheap boxes normally don't use any damping material,if they do it's only normally that cheap and nasty fluff,mixed up with tiny pieces of cheap foam,glued together.
I my boxes i use Fiberglass wadding with a special polyester film cover,so you don't need glothes and a mask to handle it.
Some expensive boxes use ,special damping foam,such as the Mackie c300,which the box is made out polyproplene and poly carbonate.
The high quality foam is usually polyester waffle-shaped foam,bonded to a melamine resin base.
The very cheap boxes normally don't use any damping material,if they do it's only normally that cheap and nasty fluff,mixed up with tiny pieces of cheap foam,glued together.
I my boxes i use Fiberglass wadding with a special polyester film cover,so you don't need glothes and a mask to handle it.
thanks guys,
also can i use those damping batts for the link i gave or will that be too dense
Alex
also can i use those damping batts for the link i gave or will that be too dense
Alex
Alex,Alex_B said:
They are very similar to Dacron pillow stuffing that you might get at a fabric store.
Rodd Yamashita
Alex
I assume that your speakers are sealed if you need 100% stuffing. The easy to get material which is commonly used is fibreglass batts. If you use dacron (pillow stuffing) it won't lower the Qt of the speaker as much, as it has less damping. Where Dacron would be useful is to put some loosely packed immediately behind the driver to form a barrier between the outside world (when you take the driver out) and the fibreglass batts with their loose fibres, and also to keep the high damping batts away from the rear of the driver so as not to lose efficiency.
Mick
I assume that your speakers are sealed if you need 100% stuffing. The easy to get material which is commonly used is fibreglass batts. If you use dacron (pillow stuffing) it won't lower the Qt of the speaker as much, as it has less damping. Where Dacron would be useful is to put some loosely packed immediately behind the driver to form a barrier between the outside world (when you take the driver out) and the fibreglass batts with their loose fibres, and also to keep the high damping batts away from the rear of the driver so as not to lose efficiency.
Mick
In Australia you can buy non-toxic and non-allergenic 100% wool insulation bats from a company called Auswool if my memory is correct.
These are designed to compete directly with fibreglass bats, sometimes with improved results.
Of course, buying insulation in these quantities will always be better than buying dacron stuffing from Jaycar or other retailers.
You may notice the same product/material sold in a shop intended for 'hi-fi' use will normally cost you upto 10 times more than from a wholesaler selling for an industrial use. It's just the way the 'hi-fi' market works. They know we like to spend money...
These are designed to compete directly with fibreglass bats, sometimes with improved results.
Of course, buying insulation in these quantities will always be better than buying dacron stuffing from Jaycar or other retailers.
You may notice the same product/material sold in a shop intended for 'hi-fi' use will normally cost you upto 10 times more than from a wholesaler selling for an industrial use. It's just the way the 'hi-fi' market works. They know we like to spend money...
Alex_B said:
Hi,
The stuff you have linked to is ideal for stuffing, it does nothing
for wall damping, it does acoustic damping as does most stuffing
material - fibre glass wool etc.
Proper BAF (bonded acetate fibre) acoustic damping has tri-lobal
fibres that increase surface area and improve damping, the stuff
that you get in pillows does not as far as I am aware, and is
usually hollow for added "insulation".
Critical stuffing density can increase effective box volumes up
to 30% but you do not need this density for effective damping
of the internal midrange sound waves.
The stuff you get in pillows can be fine for 100% stuffing.
http://auralization.blogspot.com/
As long as you do not need it to increase effective box size .....
🙂/sreten.
G'day Alex_B,
I use the stuff from Jaycar.
Easy to work with and effective.
Also not hazardous to your health like fibreglass.
I use this http://www1.jaycar.com.au/productVi...&pageNumber=&priceMin=&priceMax=&SUBCATID=645 for the back wall of the cabinet.
Cheers,
Alex
I use the stuff from Jaycar.
Easy to work with and effective.
Also not hazardous to your health like fibreglass.
I use this http://www1.jaycar.com.au/productVi...&pageNumber=&priceMin=&priceMax=&SUBCATID=645 for the back wall of the cabinet.
Cheers,
Alex
speaker stuffing
I am currently building a four way transmission line speaker using a combination of long wool fibre and a dacron type (pillow) filling.The wool fibres can be obtained from wool handlers but be warned it will more than likely require a fair bit of cleaning and then teasing out.From what i have read in the past long haired wool fibre is the best material but others may disagree with me on this.
I am currently building a four way transmission line speaker using a combination of long wool fibre and a dacron type (pillow) filling.The wool fibres can be obtained from wool handlers but be warned it will more than likely require a fair bit of cleaning and then teasing out.From what i have read in the past long haired wool fibre is the best material but others may disagree with me on this.
I have two different brands of wool batts. One type is very smooth and clean (70% wool) but a bit loose and less effective. The other is very dense (80% wool) but shed quite a bit of dust / small hairs. I am not sure if they are the result of scissor cutting or coming from the products.
I wonder how I can clean them.
Regards,
Bill
An article I wrote about stuffing reflex boxes is here..
http://sound.westhost.com/articles/boxstuff.htm
This is a scheme to absorb back radiation whilst leaving port tunning and output unaffected.
Wool is generally better at attenuating low frequencies, thats why it is used in transmission lines.
BAF and fiberglass have much smaller fiber diameters and much better attenuation at high frequencies, speaker stuffing BAF often being made with irregular fiber cross section to increase its drag.
Glass fiber is probably the best value for money stuffing for sealed boxes.
rcw
http://sound.westhost.com/articles/boxstuff.htm
This is a scheme to absorb back radiation whilst leaving port tunning and output unaffected.
Wool is generally better at attenuating low frequencies, thats why it is used in transmission lines.
BAF and fiberglass have much smaller fiber diameters and much better attenuation at high frequencies, speaker stuffing BAF often being made with irregular fiber cross section to increase its drag.
Glass fiber is probably the best value for money stuffing for sealed boxes.
rcw
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