I need to outline an earphone speaker circuit. We are told the impedance of the earphones and the base voltage they require and furthermore the voltage source. In the wake of inquiring about I have discovered that the LM386N-4 is a prevalent decision. (an example from datasheet LM386N-4 - https://www.icrfq.com/part/2377557-LM386N_4.html ). I've seen many circuit graphs yet what I don't comprehend is the means by which to pick the voltage increase required for the speaker.

I initially believed that you would need to know the info sound flag voltage and when you increased that by the pick up that would need to give the base voltage required by the earphones, yet it gives the idea that what is important is the present which I don't get.

Also, would you say you are ready to plan such a circuit without thinking about the sound information flag? In the event that you do need to think about it what is it you have to think about it and why?

I would greatly appreciate any help as I am very lost.

Thanks in advance!