To make the above-mentioned speaker, we need the following materials: a 0.5-liter plastic bottle, two sheets of thick A4-sized paper (suitable, folded in three layers, newspaper sheets), adhesive tape or electrical tape, which any motorist can find in the car. Of the tools, you will need a clerical or construction knife (if there are none at hand, then the usual sharpened one will do, it can also be found in the trunk of any car).
Having prepared the required materials and tools, we proceed directly to the manufacture of the speaker. With a knife, at a plastic bottle, more or less evenly, cut the bottom and neck so that a peculiar plastic cylinder ten to eleven centimeters long is obtained.
To the wall of the obtained cylinder, in the center, we put the end of the phone and circle it with a marker in a circle.
With a knife, we cut out the oval, we get a jack for the phone.
Having done the above operations, we got the basis for the future speaker. The next step is to fix the sheets of paper at the edges of the cylinder. To do this, we turn off, in advance, a sheet of thick paper around the edge of the cylinder in the form of a bell and fix it with tape.
We perform the same actions with the second sheet on the other end of the cylinder. The speaker is almost ready.
It remains to insert the phone into the jack of the speaker we received so that the main speaker of the phone is inside the cylinder. The sound of the music being played is enhanced by the effect of the megaphone produced by paper sockets. I wish you a pleasant listening experience.