matching impedance is for maximum power transfer.Except matching impedances is something you rarely ever want, it's mostly a VERY bad idea, particularly for audio.
You usually want a low impedance output feeding a high impedance input.
If you mean matching the speaker to the amp's rated output speaker impedance, yes.And you definitely want matching impedance for your audio power amplifier and speakers.
Which isn't something you often want, and certainly NOT in audio.matching impedance is for maximum power transfer.
No you didn't - you are completely mistaken.Before the 90s we always did it, but some equipment started having low output impedance and high input impedance.
RF is a different thing entirely, and needs to be matched to prevent destructive reflections.It depends on the application you're trying to do, but I'm from the matching impedance way of doing things, especially having worked in communications for 18 years and having a fcc license which was required to work on transmitters., and working at an am-fm radio station and a uhf TV station.
Actually, the only equipment we used with low output impedance were the distribution amplifiers because they weren't balanced linrs, everything else was matched impedance and balanced lines.
And for transmitters, they had to have matched impedance output to the antennas or things could be damaged.
Again, you don't want maximum power transfer - it's FAR too inefficient - it's theoretical best is only 50%.Audio was generally balanced 600 ohm lines.
The difference between the two types were balanced was matching impedance and unbalanced low output to high input. We were always taught to match impedance for maximum power transfer.
only in vacuum tube amps with output transformers.And you definitely want matching impedance for your audio power amplifier and speakers. You could damage your amp if your speakers impedance is too far off from the amps output impedance, or damage the voice coil.