Simple circuit to the voice of the original ，this is the consensus of most enthusiasts，the design concept of swiss dartzeel is so.
Most of the music hobbyist want to copy it ，and they found that the circuit board isn’t unstable ，but finally they compare with original one ，and found out there are a bigger SuperCapacitor was set up in the amplifying circuit ，and it would become more stable .
This amplifier board is imitated according to the original schematic diagram
Here is the schematic diagram
Amplifying PCB size:80*115mm thickness1.5mm
maybe the real product you receive is not different from the pic，because we have improved it now ，we use the si.emens and pana.sonic and fa.la capacitance
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