Have you heard or own the Shakti Hallograph

They come with instructions.

Could I put 2 Tiffany lamps behind my speakers and change the sound? Maybe. These definitely change the sound in the rooms I heard them.

Agree with Zenblaster. They do make an audible difference and in some rooms/systems might be a good improvement.

Audition with right to return as I did.

As far as cost, figure 40% off list is what Shakti sells to dealers, so roughly $700 is what they get.

I have no idea what Shakti's cost is, but I doubt it's sub $100 as there is probably a lot of labor in this.

I have them. They make a difference - for the better. Hard to explain but it makes for a clearer, less congested soundstage.

Is it true the Hallographs have a crystal inside somewhere (like the Mpingo disc) or is that an old wives tale?

At one time I had two pair of Hallographs, having heard a very convincing demonstration I think at CES. There is no question, they work. But they need to be carefully adjusted and placed. One could literally focus the sound with them.

Although Syn. Res. recommended them with the ARTs devices, in my system the two were incompatible and I went with the ARTs. Basically, if I adjusted the ARTs to be right, the introduction of the Hallographs didn't sound right and were I to adjust the Hallograph to be right the introduction of the ARTs ruined the sound.

Both are now gone. I tried the Zilplexes and got the most realism I've heard even in a very small (13 x 10 x 8') room. I am ever mindful that others have different rooms and tastes.