777
Senior Member
- Joined
- Jan 1, 2019
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There are too many stages in the power supply. First is a series diode. After that is C=470uF. After that a transistor relay and then another 470uF. Further another transistor relay and after that another100uF. After that an DC-DC swithing relay for +5v/-5v and than CLCLC post filter. That voltages will power the op-amps. From +5. will have another voltage regulator, 3.3v for es9068as. And from 3.3v will be 1.8v voltage regulator for es9068as. As you see, there are a lot of stages in cascade, one after another. Finally the sound is good, clean but without impact. The bass suffers the most, which is no longer short and penetrating. The chip, es9068as and the output stages are good, very good but the power supply.. is a nightmare for the sound.