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I'm also interested in this. I've got a bunch of rockwool on my walls now, but I'm moving to a condo owned by someone else, and don't want to ruin their walls. So I'm considering just packing the stuff into boxes, and leaving it in them. Then, I'll stack the boxes all over the place. Does anybody have any experience with using cardboard boxes with insulation inside, for bass traps? At what frequency might this start to be an absorber?
Is there any nicer-looking or cheap but effective alternative to cardboard?
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