Shakti Hallograph Sound Field Optimizer

I have a pair that I used in a sound treated room of atypical configuration with Avantgarde Trios. They made an audible improvement. I relocated them to a second home with a medium sized traditional rectangular shape and highly modified Klipsch Belles. This room was not sound treated. I could not hear a difference in the second room and system. All said from my experience, the improvements are highly variable and a function of the room and speakers.

I've now tried them in a sound treated room and did not hear a difference. My uneducated assessment is that they function as a front wall diffusor, so of limited impact in a treated room. Consider using the $ for a few sound panels, e.g., GIK bass traps, absorption panels, and QRD reflectors for the corners, 1st reflections points, and rear wall respectively. They will be the same price.