Speaker Clarifiers?

I actually have tried both the standard and the Reference Signal Purifiers in my home system and will honestly say that they do make a substantial difference ( IMPROVEMENT) in the overall sound from the speakers in the room.  They go onto the positive leg of the speaker cables only and I have zero idea of why/how they work, but I can tell you that they absolutely do.  For the skeptics - as usual, since you haven't tried them, it becomes easy to throw stones.

I'll pass

lowrider,
I can't speak for crystals, but quartz is an effective room treatment.

For you experts who haven't tried the walker HDL's, you'll just have to take my word for it that you're missing out. I'm good if you don't as well...