The main use of the acoustically effective quattro column can be found in sound-reflecting corner areas. Based on high tech acoustic fibre panels quattro provides a reduction of the mirror sound and of the reverberation time in open spaces. The applied fibre-reinforced composite materials are eco-friendly, homogenous and recyclable. This acoustical solution is available as quattro column or as quattro cube. The combination of several elements increases the acoustical effect (sound protection and sound absorption) of the quattro products by placing them in function of the specific space situation. The sober and timeless design of the acoustical absorbers is available in a selected colour range and offers a unique completion to open living and working areas. Furthermore the surfaces are pinnable.