You can put music through a PC speaker too. Some old games even managed to play some real bangers this way; but these days I'd say that stating "you can't put music through a PC speaker" when talking about commercially viable means of music playback is justified even if not technically true.
I invoked the old radios because you certainly heard a lot of music through them and they all used AM, whether over medium-wave or short-wave frequencies. Same for the ubiquitous All-American Five tabletop/kitchen radios; I've owned them, they sound just fine if you can find an AM station that's playing music.