If you’ve ever dropped your phone into a glass to amplify the sound, you know what a passive speaker is. Here’s one, made from wood, that works even better, and you can make it to fit any phone.
A full blow-by-blow is in my book, Build Stuff with Wood, coming out next year, but here’s the skinny on the how-to.
The trick is breaking it down into three layers, all made from off-the-shelf project boards from your local home center. All are 5-1/2 in. wide, but the middle layer is a thinner 3/8 in. thick while the front and back layers are 3/4.
If you have a jigsaw (or bandsaw or even a coping saw) for the curves, and almost any other kind of saw to cut the ends square, you are good to go.
You’ll notice that I left the layers long at first, so give me room for clamping as I worked on them. Then once they are all glued together, I just chopped the ends off, and then rounded all the edges to create the sleek, sexy science project you see before you.
By the way, if your phone has two speakers on the bottom, you can make a double-wide version, with two channels and two speaker holes, one on each side of the phone.