may gumawa na ba ng QRD diffusors dito sa tin?
@peeves!
i asked my brother, who supplies and sets up audiophile equipment (epoy of architectural audio). as it turns out, his QRD supplier is sir mikep, who has also built some of the home theaters of my brother's customers.
i have also contemplated a QRD DIY some time ago, and have done plenty of research. from a build perspective, 3D diffusors seem easier; more pieces but easier router-less cuts, and can be made from widely available materials. 2"x2" is easier to find than 3"x1/4", which is what i think 2D QRD minimally needs. i do not want to use 1/4" plywood because that tends to warp and, well, it looks like plywood. even if you can find 3"x1" wood, you'd have to plane it plenty to get it between 1/4" and 1/2" thickness. i thought about planing a wood moulding panel, but that isn't effort-free either. also, a good 2D QRD probably requires dado and rabbet joints, which requires more skill than 3D diffusors, which only requires "cut and paste".
heck, it is probably easier to build a helmholz resonator than a 2D QRD!
much easier in the u.s. too, where you can source a wide variety of wood and dimensions.
let me know how you DIY goes. i will probably build a 3D diffusor for the ceiling, between the monitors and my sweet spot. then i'll ask you to buld my 2Ds.