Difference b/w RPG Skyline and GIK QRD diffusors

Actually Rives specified Skylines on the front wall, and nor QRD. There also some diffusion on the ceiling and side walls at first refl..points. And , of course, a lot of bass trapping.

Maril,

The term QRD means quadratic root diffusor and refers to the math behind the calculation of these. I understand the Skyline is a QRD, but I realize it's confusing when there are commercially available products called QRD, like the GIK you asked about. Sorry my thread was ambiguous.

Diffusion in 1st reflection points on the side walls and on the ceiling (likely another 1st reflection point), is not uncommon. I would still be interested in understanding why Rives recommended diffusion on the front wall.

Horacio

RPG does make QRD panels as well, but Skylines are NOT QRD design.
I will try to ask Rives about it.

Look on line. You can buy RPG skylines for A LOT less on line. Paint them yourself for next to nothing if you want colors. There is online discussion on how to do so. Just google it. - Jim

I did look on line and there seems to be very small to no discount on Skylines, more so on LP version, that I don't need.
If you could post a link, it would be much appreciated.