History: A hand-built model of the Rice-Kellogg dynamic loudspeaker, the precursor to speakers as we know them today, invented by Chester Rice and Edward Kellogg of the GE Research Laboratory, 1924. [2576 × 3227]

https://i.redd.it/uodmkt7zr6i21.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/atmzas/a_handbuilt_model_of_the_ricekellogg_dynamic/?utm_source=ifttt