|Fun little project, or Tweak that will improve system dynamics, soundstage, frequency extremes.|
Try using Amethyst crystals. Get them in small sizes and unprocessed. I bought a pound on EBay for $10 including shipping.
To clean the unprocessed crystals prior to use, I soak the crystals in distilled water with Aquarium salt. Mixing it to become a strong sea salt mixture and letting them soak for about 8+ hours.
Then pour off the sea salt and soak the crystals with 90% or better alcohol for about an hour. After that, drain off the alcohol and rinse well with just distilled water.
Finally, let the crystals dry in a bowl in the sun.
Start with placing small amounts (25-40 crystals) in the plastic baggy things and tape the bag over your Circuit breakers to your system or on top of power cables IEC/Male end.
You can even buy at Radio Shack small project boxes. When using these types of boxes I put a lot more of the crystals in them.
You can use Blu Tack or 3M tape to stick these project boxes to outlet strips, junction boxes, over outlets, etc.
For reasons still unclear to me, it may take a few weeks (perhaps as much as 4 weeks) to sound good.
But, when it does, the dynamics will improve and so will the overall sound stage and frequency extremes.
Too much of the crystals may actually surpress the dynamics, but with the baggies you can experiment with how much of the crystals to use.
I have experimented with all kinds of different crystals, from Topaz, to Tourmaline, to Quartz and etc. The Amethyst crystals seem to work the best.