QUADRUM acoustic panels are sound absorbing wall modules made of NITONA panels, which through a thermal treatment obtain a three-dimensional structure, and thus acquire better sound-absorbing properties than a smooth surface. The interior of the panels for better effects is additionally filled with acoustic felt. The square modules with a repeatable pattern allow creating an unlimited wall composition, and by rotating the panels and using different colors, we can create any individual spatial structure. User-friendly and easy installation of panels is guaranteed by a magnetic, profiled mounting system attached to the set.