The Reppo II backpack is in fact a boombox, with speakers and an amplifier. If you’re the outdoor party type or if you simply like to share your noise music. It was created by Joonas Saaranen, an industrial design student from Germany, but don’t rush to order: it is not mass-produced right now.
Graphene Speaker Surpasses Performance of Conventional Speaker
Re:Sound Bottle Concept
The Bambory Speakers are a set of speakers made from bamboo
These concept speakers will fit nicely on your bike handles