You can carry the donut theme through your entire house. I checked out the link - those are, ahem, unusual-looking speakers. I never heard of using marble as part of a speaker cabinet.
The ribbon speakers my buddy has run about $10,000 and that doesn't include the pre-amps (one for each speaker).
They look....interesting though.
v-e-l-l-l-l-l-y interesting.
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