Critical Mass Boom Box

As a supporter of the local Critical Mass Movement I wanted to entertain my fellow cyclists with some music. In order to get some good volume and to support my DIY interest i build my own portable boom box:

It takes:

  • car battery
  • car amplifier with cinch input and stereo cable output
  • 2 bookshelf speakers (4 Ohm in my case)
  • a bluetooth audio receiver (12V powered) with 3,5 inch output
  • power and audio cables
  • power switch from car supply
  • carrying case (old wine box in my case)
  • a smartphone with your favourite music

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