Here's a pic of a woofer, Tip. She's a good dog, even though she appears with a ball when I'm listening to music.
A while ago I was looking through some gadgets on Amazon ( my principle source of speaker drivers and DAC/amp boards ) and found a device for picking up bluetooth and transmitting FM; a useful device in older cars, however it got me thinking - first the sound waves are converted to electrical waves, then converted to digital, then onto a disc, then onto a computer, then the computer will possible convert it to a different format, then bluetoothed to my phone, then filed, then bluetoothed to this device, then converted to FM, then transmitted, then picked up and converted into an audio signal, then amplified, then converted into sound waves. It's a wonder that anything of the original performance is left after all that.