4 Pack Bass Traps for Ceiling Corner 16.5" Triangle 12" Depth Triangular Pyramid Acoustic Foam Bass Trap Sound Proofing for Home Studio Booth Low to High Frequency Sound Proof Foam

bought these as they were the only thing on the market which suited my needs.Really not worth eht £70 price paid.

No fault of design, I just didnt read the dimensions. I thought they would be bigger for the price of $30 each. But thats my fault. Decent, dense foam quality. I currently use in the corner of my bed to reduce the bass trap that happens from outside low end noises. It helped a bit with mitigating the moving sound waves.

After a week, they still were not the size described.

Es material de muy baja calidad, llega empacado al vacio, comprimido. Al desempacarlo no se expande solo como otros productos. Se mira horrible, y aun que lo expandas, instalado no se mira como en las fotos del producto.

Items work perfectly. Stopped corner slap immediately.

Good corner bass absorbers if a bit pricey. They took more than the 24 hours claimed to expand to size - more like 3 days but that's minor. Why some competitors have scalloped faces and these are flat faced I do not know. I doubt there is a difference in efficacy.