"So, crystals? Sure, why not?"
Of course, why not. I have noticed that my system has better highs on the upper floor (logical) and better bass in the basement. I keep it on main floor as best of both worlds but this effect can be used to tweak the system. I'm sure I will try stones after I'm done with the placement. I wish I could move it from the basement to upper floor dependent on the music played but it is way to heavy.
Of course, why not. I have noticed that my system has better highs on the upper floor (logical) and better bass in the basement. I keep it on main floor as best of both worlds but this effect can be used to tweak the system. I'm sure I will try stones after I'm done with the placement. I wish I could move it from the basement to upper floor dependent on the music played but it is way to heavy.