These baby concrete speakers aren't as heavy as they look | TechCrunch
Concrete speaker VIRTUOSO by Gravelli
Concrete Audio
BRUTALIST-Lab - Introducing MONOLITH, the first concrete speaker in the world with terrazzo surface. The simple, minimal and ancient monolith design is a traditional pair of passive speakers with 3-inch drivers and
Master & Dynamic's concrete speaker is part art piece, part room shaker - The Verge