These are relatively high WAF wings because they are acrylic and see through, so easier to keep in the living room.
http://www.whatsbestforum.com/showt...ng-Diffusors-vs-QRD-Diffusors-Effective/page2
http://www.whatsbestforum.com/showt...ng-Diffusors-vs-QRD-Diffusors-Effective/page2