Dutch artist Olaf Mooij built a car with the sound system on the outside. In fact, he is standing in front of two turntables on this photo. His DJ Mobile is designed to be used as a driveable PA system, which you park, and then operate from a DJ platform while standing up through the open sunroof. It was inspired by the Faithless song ‘God is a DJ’ and I think it’s cool.
(Link and photo: gizmodo.fr, merci Alix!)