Bubble wrap vs Fiberglass

[TomasJ]

How does each of these behave in ported enclosure? What experience do you guys have with Bubble wrap and/or fiberglass?

Thanks!

 

[ricardo]

Fibreglass Roof Insulation is one to the two best things to stuff a speaker box with .. either sealed or ported.

But production will hate you for specifying it. 

Bubble wrap is useless for this.

 

[TomasJ]

Fibreglass Roof Insulation is one to the two best things to stuff a speaker box with .. either sealed or ported.

But production will hate you for specifying it. 

Bubble wrap is useless for this.

And what's the second best one? I am asking because I am refubrishing an old pair of speakers where I found bubble wrap in. So I would like to put inside something better with a similar purpose.

 

[ricardo]

And what's the second best one?

Equal first with fibreglass insulation is Dr. Bailey's long fibre wool.  Much more pleasant to handle but might need moth proofing.

It's also nearly Unobtainium as it comes off the backs of sheep from the Yorkshire Dales and very expensive.

And no.  I'm not joking about all the above.  Google Arthur Bailey and Transmission Lines.

 

[zebra50]

I will just pop up the hill and shave a sheep for you!

Actually our local DIY store sells a woollen roofing insulation product. I assume that has been treated to repel moths somehow. It works well for audio.

S.

 

[zephyrmic]

I agree that bubble wrap is completely useless in speaker enclosures. The aim of filling is to prevent reflections inside the enclosure, and to slow down the exit of lower frequencies through the enclosure port, or dampen the speaker in a sealed enclosure.

Over the years, I have used bonded acetate fibre in my speaker enclosures, and that seems to work well. It is white, and is used in such things as pillows and cushions, and also as insulation in heating ducts, etc. Also, it is not irritating to the skin like fibreglass. I usually staple it to the inner walls and back of the enclosure to give about 25 mm. thick. If you have a pillow or two that you no longer use, you can raid them for the fibre. See how it goes.

Kindest regards,

zephyrmic

 

[nielsk]

Cotton fiber insulation blanket (made from old blue jeans).  Used by several high end speaker manufactures, preferred over fiberglass (fiberglass board is too stiff and blanket vents glass fibers...)