Other than a minuscule bit of white off the stenceling on the BC of one cone they are prefect, mint!
These made a huge difference in my system and I actually have 5 sets under various gear. Started out with one, but made such a huge difference that I ended up ordering for everything including my outboard power supply on my Dac.
My newest Dac has volume out so I don't need the set that were underneath my pre-amp.
Below my info I have some info from the Nordost site. These are highly reviewed as well.
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