The world's first 100% mycelium bio-composite loudspeaker. Except for the screws and the speaker, it is made of mycelium composites and hemp fibre. Mycelium composites could be an important part of the circular economy. Mycelium composite means: agricultural or wood waste interwoven with fungi and then heat-treated or pressed. The acoustic and absorption properties of the mycelium exceed those of most conventional construction soundproofing materials, giving the speaker interesting absorption and acoustics. This is a prototype to raise awareness of the technology.