Hi, I don’t know what that the LLM talks about.
Headphones and loudspeakers have varying impedance according to their application.
A crystal radio speaker earpiece has high impedance but requires a tiny fraction of power. It's so little that no battery is required.
It's a piezo speaker with an impedance of about 20000 ohms.
https://www.crystal-radio.eu/enkristalspeaker.htm
https://en.wikipedia.org/wiki/Crystal_earpiece
The military radio operators and crystal radio pioneers had used similar high-impedance headphones with 2000 ohms.
https://www.crystal-radio.eu/en2000ohm.htm
The LLM statement about power consumption is misleading, thus.
A high-impedance audio device and a pair of high-impedance headphones don’t have high power consumption or powerloss.
A low-impedance audio device and a pair of low-impedance headphones don’t have high power consumption or powerloss.
The impedance simply has to match.
If it doesn't, if there's a mismatch, there will be powerloss or loss of volume.
However, it normaly causes no damage. Not in audio field.
You can use a pair of 600 ohms headphones on an ordinary soundcard, it will just be quiet.
Otherway round, you can attach a low impedance pair of headphones on a line-out port. You may hear nothing, though.
Ideally, though, a pair of audio transformers are used for conversion (impedance matching).
Two 12V to 120v AC transformers will do, as well. That's 1:10 ratio.
The iron core isn't great in terms of fidelity, but it's okay for audio frequency (AF).
Thing is, the typical consumer devices are low-impedane of about 16 to 64 Ohms.
Stuff like PC sound cards, gameboys, discmen, walkmen, pocket radios.
The typical Sony Walkman headphones had 32 ohms.
Edit: From the 1970s, I mean. There were mono/stereo models.
Mono models might have been wired in series or parallel, resulting in different impedance.
That's why the AKG K141 Monitor had existed in 600 ohms and 55 ohms.
The newer model is for today's consumer electronics, rather than traditional hifi/studio equipment.
Things like line-out (sound card, radios) use 1000 ohms impedance, roughly.
They are more sensitive to static electricity etc, thus.
Edit: More information here: https://en.wikipedia.org/wiki/Line_level
The telephone (landline) had used 600 ohms, too.
The speaker in the handsets is of high quality and high impedance (600 ohms), too.
PS: The carbon mic is poor, though. The handset speaker can be used as a microphone, too, if an one transistor amp is used (2N2222 or BC548).
Then there's XLR stuff amd what not, which I'm not very familiar with.
"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel
//My video channel//