I have tried them under tube gear, under solid state gear, and have also used them between the upper and lower cabinets of a pair of Von Sweikert VR5SE speakers. They actually work extremely well. I was quite surprised by the improvements they made.
I had the same experience, but then my wife slow cooked them overnight in the Le Cruset Dutch Oven, and the next day it was a jaw dropping, veil lifting meal!
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