Auralex pArtScience SpaceArray audio diffusors work and look great. There are diffusors that cost twice as much, but there's simply no reason for you to spend the extra money. The SpaceArray combines hemispherical acoustical diffusion with a top quality wood finish. This design has been built on a quasi-random series for superior performance without visual patterning and the result, both visual and aural, is quite stunning.

The SpaceArray is handmade from solid Paulownia wood (used in musical instrument construction) and give a very natural feel to the room that is extremely conducive to maximizing creativity. Strong yet lightweight, the beautiful 24"x24" solid wood panels are easy to install and can be used in a variety of placement options.

For larger control rooms, try putting a grid of SpaceArrays on the rear wall to provide broadband diffusion to the listening area for a sense of being immersed in the sound.