Shakti Hallograph Sound Field Optimizer

.... the sound of one pair of Hallograph is salubrious, exquisite, stunning, glorious and dazzling and the sound of another pair is superlative, smashing, magnificent, superb and impeccable...but it can be improved dramatically, when a Vibraplane is below them...so airy...this nailed "nothing" focussed in the soundstage must be heard to believe.

From what I understood from talking with the maker, speaker type can make a difference too. Boxed monopoles are OK. Dipole types, not so much...

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.

Wonderful improvement in depth,imaging and bass.