September 2020

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. What It takes Everything can be bought second hand. The whole setup should not cost more than 50EUR (except mediaplayer). car battery (12V 45Ah, lasts round 10h in my case) 2 channel car amplifier with cinch input and stereo speaker output (Example Amp) 2 bookshelf speakers (4 Ohm in my case) a bluetooth audio receiver (12V powered) with 3,5 inch output...

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