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Low-cost Spherical Speaker Array

Step 12Attach the speakers to the bowl

Attach the speakers to the bowl
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I started this process with the top speaker. Fit the speaker into the hole, and use a pencil to mark where the bolts should go. Remove the speaker and drill holes that are the same size as your bolts. If you get the right size, the bolts will actually cut some threads on the way through the plastic. This isn't very strong, of course, so on the back put a washer and a locking nut. I used locking nuts because there will be a lot of vibration in this system.

There is going to be a fair bit of muscle and bending in this step. As you can see, both the speakers and the bowl are a bit bent by the end. That's fine, it just makes the whole thing stronger. :-)

Repeat for the three side speakers.

BTW: It's possible that by this point you accidentally poked a speaker, and dented it.
Here is an instructable on "unpoping" dented speakers.
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Author:mzed