What type of fiberglass is this?

KurtR · 3rd January 2006

I do not know what kind this is. It's a sample I got from a a/c company. They said I can get a pack of 4 4 foot by 10 foot sheets for about $125. I'm not sure if its a good deal or good fiberglass to use for acoustics. I want to make some panels for the walls and bass traps.

So any help.. Ethan?

nosebleedaudio · 4th January 2006

That is basicly 703 with an aluminum backing, single thinkness will work the same, double thickness... you will have alot of trouble getting the backing off without destroying the 703.

AcousTronic · 4th January 2006

See if this company has a location near you: http://www.spi-co.com/
They sell all kinds of rigid fiberglass. You can get it without the backing for a decent price. Also, you'll probably want the 6lb board, not the 3lb.

nosebleedaudio · 4th January 2006

3 lb is better....

Ethan Winer · 4th January 2006

Kurt,

> I do not know what kind this is. <

I can't tell for sure without picking it up and feeling it. If you have a piece in hand you can weigh it and calculate the density. 701 weighs 1.5 pounds per cubic foot, 703 is 3 pounds per cubic foot, and 705 (best for bass trapping) is 6 pounds per cubic foot.

--Ethan

Glenn Kuras · 4th January 2006

Quote:

Originally Posted by nosebleedaudio

3 lb is better....

3 pound is good for first flextions in the room, but as for bass trapping you really want to use 6 pound...
BTW you can leave the facing on if you want to pick up a little more low end. The trade off is more of the high end will reflect. Which is not a bad thing if you are looking for that. Most people make the bass traps with the facing staddling all corners then make panels without the facing for the first reflections.. Oh one more thing.. Maked sure the facing is facing the room.. DO NOT put on the back of panels..

Glenn

KurtR · 5th January 2006

This backing is pretty easy to take off. I have no clue what lb/foot rating it is. I'll ask them when I go see about it again. Thanks for all the info!

norman_nomad · 5th January 2006

The insulation with facing is usually called "FRK" or "FSK" and the faced 703 and 705 absorbs a bit more low end, and absorbs a little more evenly across the frequency spectrum.

The price you quoted seems pretty good... I know I paid more than that, but I live in the bay area and we pay more for everything.

3rd January 2006	#1
KurtR Gear addict Joined: Sep 2005 Posts: 303 Thread Starter	What type of fiberglass is this? I do not know what kind this is. It's a sample I got from a a/c company. They said I can get a pack of 4 4 foot by 10 foot sheets for about $125. I'm not sure if its a good deal or good fiberglass to use for acoustics. I want to make some panels for the walls and bass traps. So any help.. Ethan?

4th January 2006	#5
Ethan Winer Gear Guru Joined: Oct 2002 Location: New Milford, CT, USA Posts: 12,334	Kurt, > I do not know what kind this is. < I can't tell for sure without picking it up and feeling it. If you have a piece in hand you can weigh it and calculate the density. 701 weighs 1.5 pounds per cubic foot, 703 is 3 pounds per cubic foot, and 705 (best for bass trapping) is 6 pounds per cubic foot. --Ethan __________________ Ethan's audio book is now available!

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4th January 2006	#2
nosebleedaudio Lives for gear Joined: Jun 2005 Location: Birmingham, AL USA Posts: 3,703	That is basicly 703 with an aluminum backing, single thinkness will work the same, double thickness... you will have alot of trouble getting the backing off without destroying the 703.

4th January 2006	#3
AcousTronic Gear nut Joined: Oct 2005 Location: Miami, FL Posts: 112	See if this company has a location near you: http://www.spi-co.com/ They sell all kinds of rigid fiberglass. You can get it without the backing for a decent price. Also, you'll probably want the 6lb board, not the 3lb.

5th January 2006	#7
KurtR Gear addict Joined: Sep 2005 Posts: 303 Thread Starter	This backing is pretty easy to take off. I have no clue what lb/foot rating it is. I'll ask them when I go see about it again. Thanks for all the info!

5th January 2006	#8
norman_nomad Lives for gear Joined: Mar 2004 Location: San Francisco, CA Posts: 2,711	The insulation with facing is usually called "FRK" or "FSK" and the faced 703 and 705 absorbs a bit more low end, and absorbs a little more evenly across the frequency spectrum. The price you quoted seems pretty good... I know I paid more than that, but I live in the bay area and we pay more for everything.