Esb - the purveyors of Sistrum gear have sullied their reputation here through shameless and deceitful self-promotion on this forum. Hence I have reservations and perhaps a bias.
Having tried their product I can say that I thought the sound was decidedly better than using simple brass cones, but generally in the same direction. That is to say, a muddy sounding system will open up using Sistrum, but at the expense of adding resonant peaks that will color all that passes through your system.
Under speakers seems the best application to me, but under electronics there seemed to me to be far better ways to go.
Having tried their product I can say that I thought the sound was decidedly better than using simple brass cones, but generally in the same direction. That is to say, a muddy sounding system will open up using Sistrum, but at the expense of adding resonant peaks that will color all that passes through your system.
Under speakers seems the best application to me, but under electronics there seemed to me to be far better ways to go.