I have been doing a lot of listening sessions on my recently built Lambda speakers lately and I just bought some GIK grid diffusors. I can not believe the difference it made in my room. If someone was to tell me how much difference it would make i would say BS!. The imaging is better, there is more separation between instruments and there seems to be better "focus" almost like less smearing. I can hear more detail and hearing things i never heard before, and just from a 4 pack of diffusors. Now I will complete the room and purchase some TriTraps and more diffusors and some absorptive panels. Wow!