Not clear work this horn loop, know Daniel trouble to give directions, thank you! PDF information in the screenshot, the graph SD8002A chip signal into the first level op-amp reverse side, the reverse signal after amplification V01 directly into the horn, the other part into the reverse end of the secondary effluents, reverse enlarged V02 as another pole of horn, V01 and V02 is the phase difference of 180 degrees, if the speaker sound is to use V01 difference as driving source and V02 voltage signal, the working current of the horn is how to flow to the power of the cathode? Through the op-amp inside? Op-amp internal impedance is high, isn't it? Actual working horn sounds great,

CodePudding user response:

All amplifiers are relative high impedance input output, low resistance