As someone once said, there are things we don't know we don't know.
Part 15 dot US is in the business of at least helping us realize what we don't know so we can try to learn more about it.
When I came here I had no clue about the importance of grounding for RF signal propagation. To me "grounding" was an electrical safety issue, and all the homes and apartments I've lived in had old two-wire wiring with no "3rd blade" for ground, yet no one died.
Now I realkize that "ground radials" are the other half of the AM antenna.
More recently, in the Alpmic Project I've been messing with since 1990, I gained a huge new insight into the numerous uses of capacitors in electronic circuits and am much closer to some day building a time machine.
But there's still more that I am not able to compute.
Here's the down low:
Capacitors block DC, ok that's easy to comprehend.
Capacitors pass AC, and since analog audio is generated as an Alternating Current we know that much.
So, why can't capacitors be used, say, in series with a lamp cord to turn on a lamp with 110 VAC? Of course the voltage rating of the cap would need to be taken into account, but capacitor voltage ratings are given in terms of their DC handling capacity, so what about that?
The fact that there's no reason to put capacitors in series with a lamp cord is not the point. My point is that, given everything else, it should work.