This is the best deal I've found on acoustic treatment/foam

asdfdsa · 19th January 2012

Any input on this stuff? It's about half price of the cheapest owens corning (or any other rockwool type of material) and shares very similar sound absorption properties. Do you know of any better deals?

Thanks

eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

(There's a sound absorption coefficients chart when you scroll down)

Starlight · 19th January 2012

There is a sticky topic which acts as a forum index: Acoustics/Treatment Reference Guide - LOOK HERE!. Have a read of section 7b to understand better how poorly the sound absorption of these panels are. At 1.5" you will want to layer them 3 or 4 deep.

asdfdsa · 20th January 2012

^ This cheaper material is practically identical to 700 series stuff, the only difference is poorer performance in the 125hz band, and even better performance in the mid and high mid range.

I'd think you could get some other material to cover the low-mid and bass end anyway.

Please explain how I'm wrong if I am.

Thanks.

OC 701 2''

0.22 0.67 0.98 1.02 0.98 1.00 0.90

Fiberglass duct board 2''

.19 .64 1.08 1.13 1.06 1.06 1.00

PaulRain · 20th January 2012

you can get better results with more or less any mineal wool, and spend a lot less.

asdfdsa · 20th January 2012

Quote:

Originally Posted by PaulRain

you can get better results with more or less any mineal wool, and spend a lot less.

Can you please link me a source, or give me a phone #?

I've spent nearly a dozen hours trying to find a better deal, and most of that timne trying to find mineral-wool suppliers.

asdfdsa · 21st January 2012

bump

can anyone show a better deal?

asdfdsa · 22nd January 2012

any good online sources?

seen-da-sizer · 22nd January 2012

Quote:

Originally Posted by asdfdsa

Can you please link me a source

This reference page saved my day:

http://www.bobgolds.com/AbsorptionCoefficients.htm

Thanks to GS, someone posted it here on the board. It helps you to research for alternative products.

Quote:

Originally Posted by asdfdsa

I've spent nearly a dozen hours trying to find a better deal, and most of that timne trying to find mineral-wool suppliers.

I was in the same boat. Just don't give up! The only thing I can suggest, buy local. If you have to ship these panels, it may increase your overall costs quite a bit. But it depends on where you live. In my case a box of panels would have been 3x more expensive. I found my provider in googling for HVAC suppliers in the local area. None of my local building supplies stores carried rigid panels. Good luck.

asdfdsa · 22nd January 2012

Quote:

Originally Posted by seen-da-sizer

This reference page saved my day:

http://www.bobgolds.com/AbsorptionCoefficients.htm
None of my local building supplies stores carried rigid panels. Good luck.

Thats the reference page I used to compare in this post:
Thanks for the link though it makes it easier to find.

Quote:

Originally Posted by asdfdsa

Thanks.

OC 701 2''

0.22 0.67 0.98 1.02 0.98 1.00 0.90

Fiberglass duct board 2''

.19 .64 1.08 1.13 1.06 1.06 1.00

I've tried local suppliers, but I'm in a small town, and anything other than what Home Depot has is next to impossible to get here...though I"ll continue to hunt, I'm hoping someone can clue me in to the deal I found online since it's the best option I've seen, or someone can point me in a better direction.

Thanks

PaulRain · 22nd January 2012

really, any kind on mineral wool will do, the key point is the use you need it for and then thickness and density, but more important the flow resistivity, this is a matter that have been discussed a lot in this furom.
the next question that I will ask is do you plan to do a little bit of diy or do you prefer to buy ready made products?

asdfdsa · 23rd January 2012

Quote:

Originally Posted by PaulRain

really, any kind on mineral wool will do, the key point is the use you need it for and then thickness and density, but more important the flow resistivity, this is a matter that have been discussed a lot in this furom.
the next question that I will ask is do you plan to do a little bit of diy or do you prefer to buy ready made products?

Totally DIY, really all I need is the cheapest/best source for material, and I can do the rest...will also brush up on my design plan by reading more threads on general acoustics and such.

PaulRain · 23rd January 2012

I'm no expert here, you will get much more usefull and complete informations reading the several posts in the forum, what I could do if telling what I did in my room, which is a small room not ment for this porpuose so I did what I could.
Given a goor room, there is for sure the best, or few best ways, to treat a room (I mean one specific room, not general rules), and this means knowing the theory and to be able to apply it in practic.
This could be very complicate and frustrating

I will suggest you to start with broad band panels made of mineral wool which I suppose was your idea in the first place.

1- find the best position of the monitors in the room which cost nothing but time to actually find the spot. A measure microphone will help a lot here

2- eliminate early reflections....this is the easiest thing to do.
3- bass traps.... a lot less easy than the previous.

early reflections needs relatively thin panels.... bass traps needs to be thick.
after a lot of research I decided that very dense material is useless (I know many will probably not agree but, you know, everybody have his own thoughts).
the problem is to chose the right material according with the way you are planning to build the panels. Stiffer mineral wool panels helps to keep the structure but are more expensive, I will rather spend the same money and make the panel twice as thick.
..........by the way sorry for my bad english :(
I don't know how much money you are planning to invests so I go for the cheap way

I my very personal opinion rock wool 40 Kg/m3 is the right choice for an all round duty.
early reflections 8 or 10cm for the bass traps depends where you plan to position them, if I start today from scratch I will do big superchunks in all the available corners and soffit traps in the croners between ceiling and walls.
Again I want to say I just jumped on the first step of the long stair of acoustics, I suggest you to read many of the superb 3Ds in thid forum, most of the answers are there already (the problem sometimes is that there is too many answers

anyway....make a drawing of the plan of your room so we can see what can be done.

19th January 2012	#1
asdfdsa Lives for gear Joined: Aug 2010 Location: USA Posts: 1,092 Thread Starter 15 Reviews written	This is the best deal I've found on acoustic treatment/foam Any input on this stuff? It's about half price of the cheapest owens corning (or any other rockwool type of material) and shares very similar sound absorption properties. Do you know of any better deals? Thanks eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices (There's a sound absorption coefficients chart when you scroll down)

20th January 2012	#4
PaulRain Gear maniac Joined: Dec 2009 Location: Italy Posts: 275	you can get better results with more or less any mineal wool, and spend a lot less. __________________ ___PaulRain www.bobbalera.com

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19th January 2012	#2
Starlight Gear maniac Joined: Mar 2011 Location: UK & Slovakia Posts: 254	There is a sticky topic which acts as a forum index: Acoustics/Treatment Reference Guide - LOOK HERE!. Have a read of section 7b to understand better how poorly the sound absorption of these panels are. At 1.5" you will want to layer them 3 or 4 deep.

21st January 2012	#6
asdfdsa Lives for gear Joined: Aug 2010 Location: USA Posts: 1,092 Thread Starter 15 Reviews written	bump can anyone show a better deal?

22nd January 2012	#7
asdfdsa Lives for gear Joined: Aug 2010 Location: USA Posts: 1,092 Thread Starter 15 Reviews written	any good online sources?

23rd January 2012	#12
PaulRain Gear maniac Joined: Dec 2009 Location: Italy Posts: 275	I'm no expert here, you will get much more usefull and complete informations reading the several posts in the forum, what I could do if telling what I did in my room, which is a small room not ment for this porpuose so I did what I could. Given a goor room, there is for sure the best, or few best ways, to treat a room (I mean one specific room, not general rules), and this means knowing the theory and to be able to apply it in practic. This could be very complicate and frustrating I will suggest you to start with broad band panels made of mineral wool which I suppose was your idea in the first place. 1- find the best position of the monitors in the room which cost nothing but time to actually find the spot. A measure microphone will help a lot here 2- eliminate early reflections....this is the easiest thing to do. 3- bass traps.... a lot less easy than the previous. early reflections needs relatively thin panels.... bass traps needs to be thick. after a lot of research I decided that very dense material is useless (I know many will probably not agree but, you know, everybody have his own thoughts). the problem is to chose the right material according with the way you are planning to build the panels. Stiffer mineral wool panels helps to keep the structure but are more expensive, I will rather spend the same money and make the panel twice as thick. ..........by the way sorry for my bad english :( I don't know how much money you are planning to invests so I go for the cheap way I my very personal opinion rock wool 40 Kg/m3 is the right choice for an all round duty. early reflections 8 or 10cm for the bass traps depends where you plan to position them, if I start today from scratch I will do big superchunks in all the available corners and soffit traps in the croners between ceiling and walls. Again I want to say I just jumped on the first step of the long stair of acoustics, I suggest you to read many of the superb 3Ds in thid forum, most of the answers are there already (the problem sometimes is that there is too many answers anyway....make a drawing of the plan of your room so we can see what can be done.