Picture of Coconut Speaker
Loudspeaker gets mounted into an empty coconut shell. Second life for the shell, improved sound from the speaker.
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Step 1: Gather materials

Picture of Gather materials
One speaker. 2" dia, which I was using to listen to the output of a few experimental audio amplifiers intended for alarm and warning sounds. Volume was more important than fidelity, so some sort of a resonant enclosure was indicated. It measured about 7.5 ohms with my HiOki digital meter.

One coconut shell. In two halves, with a clean break and no pieces missing. Large enough to accomodate the speaker inside.

One more half shell (optional) for the base, if you do not want your enclosure to roll off the desktop.

Step 2: Drill out eyes

Picture of Drill out eyes
I drilled out the half with the three 'eyes' for the sound. The result looked like a face, so I enlarged the mouth a little bit more.

Step 3: Fit bracket for electronics

Picture of Fit bracket for electronics
The other half was drilled to accept a bolt and nut to hold a bracket made of tin sheet which might hold a circuit board inside.

Step 4: Fix the fabric to keep insects out

Picture of Fix the fabric to keep insects out
I glued in a piece of acoustically transparent fabric, and checked the fit of the speaker.

Step 5: Fix the speaker

Picture of Fix the speaker
A mounting hole was cut in the back half of the shell, and it was fixed to the base with a nut and bolt.

I used a two component epoxy filler to seal the gaps around the speaker. Since the shell is not perfectly round, air can leak around the sides of the speaker and this will lead to a loss of volume. I used a plastic bag to isolate the speaker from the sticky compound so that the cone would not be contaminated.

The filler will have to be cut away if the speaker ever needs to be replaced. But then it might be easier to make a new enclosure, because the replacement speaker might not be of the exact size as the old one.
J-Five3 years ago
I've Got a Lovely Bunch of Coconuts
erosser6 years ago
Anyone seen the "Milky Joe" episode of The Mighty Boosh? Creeeeeeepy...
my favorite episode.
"can this thig go any faster?!!!!!'
"aw, i got a stich!"
Now you can play Jared- the butcher of song!
PetervG8 years ago
I have a hollowed coconut shell cut in 2. I use them to make the Monty Python horse sounds like in the Holy Grail. "You're not a real horse, you know. What? You're not a real horse. You're two coconut shell halves, and they banged you together to make the sound of horses' hooves. So?"
Mitten PetervG8 years ago
But coconuts are tropical! This is a temperate zone!
A swallow could have carried it...
what, an african swallow?
actually, i think it mightve been an albatross
God I just realized how much we're mutilaing these quotes. Also, nice job on the speakers, very original.
eriklares7 years ago
i don't like coconuts, do orange skins work?
icedog5158 years ago
those thingies look weerd but theyr cool
castcase18 years ago
Nice shell, is it a speaker amp? Or, just a shell.
It looks really awesome :)

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