A beer box with soft touch handles pimped with two 2-way car speaker (15 W). The name KiMiRo stands for, in german, "Kiste-Mit-Rollen" (in eng. Box-with-Wheels). The wheels are mounted in case of better transportation abilities.
Additional details are following immediately.
The best is one with smooth handles
15 Watts each
30W car amplifier 12V
12V lead battery
Moped type for a smaler form factor