Busking does earn you a living if you’re pretty good, and assuming you live in a city where busking is an accepted culture. The Look! Speakers would then be a busker’s best friend, since it can be hooked up to a microphone or compatible musical instrument of choice in order to further draw attention to your skillset as you entertain myriads of people across the entire strata of society. No idea on what this conceptual speaker is powered by though, but solar would be a viable option with the choice of plugging it in to a power outlet as well.
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