I was so impressed by their marketing claims that I bought a few pounds and stuffed it into the ports of my Three Pi Theater speakers. There was an immediate improvement in the sound, even before the rocks had time to break in, but only when I used it along with the intelligent chip, the clever little clock, brilliant pebbles, and the tru-tone duplex cover. Oh, I forgot to mention, you also need to be wearing a magnetized ion bracelet when you insert the rocks. Amazing product!