audiosoul 52 Pack Acoustic Panels 1 X 12 X 12 Inches - Acoustic Foam - Studio Foam Wedges - High Density Panels - Soundproof Wedges - Black/Orange

Orange panels perfectly expanded, but black ones didn't completely expand even after over 48 hours of waiting. Almost all of the black ones have squished sides after expanding, and as a result, they don't fit perfectly with the orange ones on the wall. Pictures added for reference. Additionally, don't expect to be able to use double sided tape to attach these, it doesn't hold at all. Use something like hobby glue instead.

I Purchase 1 packed these and I gotta say these things did not disappoint in terms of quality. When you first open them up they are extremely flat but just like the instructions tell you they take about 24 hours to expand. I loved them so much I bough a 2nd batch and they were even better. They took about 5 minutes to expand. The reason why I give It 4 stars is because I find it very difficult to stick them to the walls. Almost nothing sticks to these things not even super glue. I had to nail them into the wall.

So far, so good. They are very easy to apply and look pretty good for our new Podcast studio, they soften the live room noise. I used a combination of staple gun and 3M spray adhesive to apply

Really works

Very thin and does not absorb much at all.