In this video I build a very simple loudspeaker from paper, cardboard and copper wire. \r<br>I talk about how the speaker works, and test it in the end.\r<br>¤¤¤¤ -- SUPPORT Ec-Projects -- ¤¤¤¤\r<br>\r<br>By using my Amazon affiliate links (No extra cost for you!)\r<br>Amazon US - \r<br>Amazon UK - \r<br>Amazon DE - \r<br>\r<br>By becoming a Patreon for as little as $1 per month \r<br>Patreon - \r<br>\r<br>¤¤¤¤ ----------------------------------------- ¤¤¤¤
