Armstrong 1135 Acoustical Panels

Hello all, A friend of mine gave me some leftover "Acoustical Panels" for use in my studio. They are Armstrong #1135. Are these of any use in a recording studio, or are they better suited for residential use, and I'm better off using OC703? -or- Is there any way I can incorperate them in my design without them causing problems? I really hate to discard them after she was thoughtful enough to save them for me. Thanks,

http://www.armstrong.com/resclgam/na/ce ... Id=44647.0 For something temporary, and cheap, and using multiple 1/2" sheets in a 2" thick configuration, then maybe. I think you're better off with anything on this page that's got similar absorption coefficients to 703. http://www.bobgolds.com/AbsorptionCoefficients.htm

Ok, thanks z. Sorry I haven't been back on before now. I'll use 'em like you suggested and see what happens. :)