you can store it in your pocket......................................................
0V voice amplifier & BASS BOOST SPEAKERS......................
NO pcb...........NO capacitor,diode etc . .....................................
using only old mobile speakers,9v battery& head phone.......
TRY IT YOUR HOME NOW...........................................................































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so 18 speakers require 18x.5(or more) =9 V (or more)DC power supply. so we use a 9V battery.
if we do not use a battery , the volume of the speakers will be low, because only 0V current reaches the speakers from the head phone jack of your mobile phone.
Kudos for making it out of cardboard!
it is so funny.........