Quadratic Diffusers


I'm looking over the GIK Gotham N23 5″ Quadratic Diffusers. 

Anyone have any experience with these or similar? Care to comment?

What did you think of their construction, hanging hardware, aesthetics, effects on the sound, placement ease or difficulty?
https://www.gikacoustics.com/product/gotham-n23-5-inch-quadratic-diffusors/
128x128hilde45
I have a number of RPG Skylines (2' X 2' X 4") and a number of RPG which are (2' X 2' X 6"). The larger ones have a few missing pieces but the Skylines are perfect. These are made out of a sort of styrofoam material. Feel free to contact me directly in the event I decide to sell. Through the years I have accumulated enough material to do a few rooms and it is taking up space.
I looked for skyfusers a while back. Alot of options out there. I ended up with Vicoustic DC2. Largest area for the price, can easily be mounted with double sided tape on ceiling or walls and was inaudible from the wood versions.
@hilde45 - So it's been a few months, what have you ended up doing?

Today I finished the second of four QRD17 diffusers, I used linseed oil and they look beautiful. Next task is placement, and finish off the last two diffuser assembly and oiling. I had no idea that they'd be as heavy as they are.

I am going to try them between the speakers on the front wall first.

Anybody who's got quadratic diffusers I'd like to hear from you as well?


@rix 

Have not done anything yet because have been having a new room built. How hard were yours to build?