Originally Posted by BroncoSport /t/1420612/lina-acoustic-vs-owen-corning-oc-703#post_22226113
Johns Manfield IS300 Linaccoustic is virtually the same thing as OC703. Around here we can't get Owens Corning but there is a Johns Manfield plant within an hour from my town. When I was pricing the IS300 and looking at the options, The 2" version WAS available, but for the price difference I decided to glue one layer on top of the other! I have to save money somewhere!!!
Here is a link to Bob Gold's absorbtion table. You can see the results on each product for yourself.
Oh, and BTW...after researching bass traps, I decided to NOT use rigid insulation (superchunk) and instead spanned the corners with standard faced insulation (r13). Supposedly that provides better bass trapping.
Originally Posted by sukumar /t/1420612/lina-acoustic-vs-owen-corning-oc-703#post_22226979
Thanks for the reply. Is R13 available in any stores? I am assuming this is same as pink material that people talk about with GFR 5000. I think it is hard to build bass traps with these material since it is pluffy. Did you follow any web site or link?
Originally Posted by BroncoSport /t/1420612/lina-acoustic-vs-owen-corning-oc-703#post_22227359
R13 is standard pink (or yellow) faced insulation batts. I bought 24" wide pieces to span my front corners and front ceiling to wall angle. CHEAP stuff. What I did was attach a furring strip (wood), vertically, to the appropriete place on my front wall on both sides. I wanna say they were about 15" out from the corners, but not 100% on that. Next, I stapled the sides of the insulation facing to that board the the back side of my front false wall, basically covering the corner at a 45 degree angle. And lastly, even though my wife yelled at me for the fumes, I spray painted the facing with cheap flat black paint. Worked great and was one of the easier things to do in the theater!
Originally Posted by BroncoSport /t/1420612/lina-acoustic-vs-owen-corning-oc-703#post_22228357
FYI, according to several here, the fluffy insulation has better bass absorbtion than rigid fiberglass (OC703 or IS300) and it's a heck of a lot cheaper! You can make superchunk style traps by building support shelves every couple feet (it can't support its own weight) or span the corners like I (and others) did.
Good luck on your project.
Originally Posted by sukumar /t/1420612/lina-acoustic-vs-owen-corning-oc-703#post_22229150
I also read about it. GFR (how easy bass enters) is good for pink vs oc 703. However, people said if you have more space go for pink stuff. I wonder if I have space for 17x17x24 or 24x24x34, still pink stuff R13 useful or not. I am assuming that this is available from any Home depot.
Thanks localhost. I enjoy reading your posts.Quote:
Originally Posted by localhost127 /t/1420612/lina-acoustic-vs-owen-corning-oc-703#post_22232525
34" faced minimum for low GFR material.
porous insulation is a velocity-based absorber; thus, the insulation needs to be placed (spaced away from rigid boundary) into areas of high particle velocity to be most effective. as you build thicker and thicker porous-only LF absorbers (to space the insulation further from the boundary into areas of higher particle velocity for the longer (lower) wavelengths), you'll want to use a material with lower flow-resistivity. if doing this approach, take care that the fluffy insulation is NOT compressed and LOOSELY filled. if stacking vertical chunks in the corner, utilize horizontal supports every few ft to minimize compression of the lower layers. or, more ideally, hang strips of pink fluffy from the ceiling down (using gravity to your advantage),- with wider and wider strips as the layers increase and protrude out/away from the corner (creating a corner chunk of vertically 'hung' strips of insulation).
Originally Posted by sukumar /t/1420612/lina-acoustic-vs-owen-corning-oc-703#post_22233055
Thanks localhost. I enjoy reading your posts.
Unfortunately, I settled to OC 703 and just bought six boxes of them. I only have 1 and 1/2 feet on each side of the screen. So, only 17x17x24 will work for me.I never knew anything about speaker placement, acoustics when I set up my home theater.
I am planning to put them in four corners from floor to the ceiling and also left to right on screen wall and on the back. I will also try to add more absorption panels and will see how it improves performance. I don't like smell of OC 703. Hopefully, it will wear down.
Thanks for sharing. Hopefully OC 703 will wear down quickly for smell. All the boxes are lying in my garage. They smell like dried Fish in Asian markets;-). I wonder if there is anyway like putting them in sun etc that I can do now to loose smell quickly.Quote:
Originally Posted by GetGray /t/1420612/lina-acoustic-vs-owen-corning-oc-703#post_22234776
FYI, I insulated my personal theater with 2 layers of OC R30 in the 20" trusses that make up the ceiling structure. The smell was so bad I complained to OC. They came out inspected, agreed, and paid me for the cost to replace it with a different brand. Very good of them really. I can't say enough good about their customer service. But 'd be careful using OC pink inside. Their new binder has an odor, I don't think they are expecting people like us to put it inside living spaces. I replaced it with Knauff.