What you see here is truly a one-of-a-kind backpack known as the Reppo II backpack. It was an idea envisioned by industrial design student Joonas Saaranen who brought it to life by throwing in a couple of full-range speakers and an amplifier, letting you share your favorite songs with everyone else on the bus or in the tube. It is pretty much a portable subwoofer, and this concept has gone so far as to be a fully functional prototype although Joonas has not mentioned whether he will have them sent to a factory for mass production. I'm sure these'll fly off the shelves should they be made commercial.Source: Technabob
Reppo II backpack concept
