Make your own munny hoodie by following my easy to use template, available for free download here.

7" (17.78cm) Self-contained backpack using 4 AAA bateries or a 9V DC adapter 1W X 2; 150Hz-180kHz Speakerboxxx is a combination of a KidRobot Munny and a hacked iPod dock. Although usually seen with his Shuffle, his backpack amplifier bumps with just about any device.   See the step-by-step of how speakerboxxx was constructed over at deviantart.com.