[HIGHLIGHTS] Why when you put a speaker upside down the sound does not come out the other way around?

To change the operation of the speaker would have to make a hole in the back. The fundamental part of the loudspeaker is a membrane that moves following the voltage variations of an electrical signal.

To prevent both from interfering and damaging the sound field that we intend the speaker to generate, we enclose the membrane in a box that prevents the back wave from propagating. If the speaker does not have rubber feet, try to put it on top of a not very heavy piece of furniture, or a wooden box.