Why changing the impedance all the time?

Sound production and reproduction from producers brain to listener's brain may involve a microphone near the input and a loudspeaker near the output.


If Bono sings in the studio with an SM58 the voice coil is typically 25Ω or near to let's say 8Ω.


Then at the other end of the listener there is very usually a speaker of 8Ω.


But in between these, the signal is not left alone. We change its impedance all the time.


The 25Ω is stepped by an internal mic transformer to 200Ω.


200Ω is set down the line and then is stepped up again to a higher impedance by a studio signal transformer to drive an electron tube grid, or the gate of a JFET.


And there are again transformations perhaps to lower impedance to drive transistors.


And then at the listener's end if an electron tube power amplifier is used again a high impedance is changed by a trasformer to low impedance to drive the 8Ω voicecoil.


Could we just use a darlighton current amplification stage and drive directly from a microphone voice coil the voice coil of a loudspeaker?


There may be noise considerations but who knows?


We could also step up a great 25Ω mic such as a Grampian DP4/L to just 2.5KΩ and drive a low noise electron tube booster preamplifier such as Pleiadss V6. And then perhaps add some more stages and drive a high impedance voice coil speaker.


These are nice experiments. And it should sound great? one mic used in a room and a loudspeaker directly resproducing in another room. Just linked by a cable.


But why not having a listener next to us while playing the piano or the guitar?


Or a singer sing to us directly to our ears?


Or our sweetheart on a quiet beach singing to us, to herself?


We have lost paradise just by choice.


We have the freewill getting it back.