Please comment and vote.
Step 1: Tools and Materials
~2m of 4 core speaker cable, $3-$4 (this was complete overkill. get thinner cable)
2 speakers, $4-$5
stereo jack, $1.95
headphone thingy, free from airline.
The tools list:
hot glue gun
dremel (not shown)
Step 2: Cut the Coconut
drill hole through eye of coconut
put coconut in vice
with a cross-cut saw, cut not through the eyes, but the other way
get a butter knife and start prying the flesh out
eat flesh, drink juice, or make coconut milk
Step 3: Drill Hole on the Top of the Coconut Half
Step 4: Now the Other One...
Step 5: Making the Headphone Thingy Comfortable
As my headphone thingy was very, VERY uncomfortable (to the point of pain) with the coconuts on them, I had to make them wider. Yours may not be uncomfortable, so you are lucky and won't have to do this step. But for everyone else, here's how you do it:
Stretch your headphone thingy over something, ie a vice, under your desk etc. and start attacking it with the heat gun on max. When it is pliable enough, hold it in the position you want, and let it cool. You have to keep tension on it the whole time, other wise it will return to its former shape.
Step 6: Right Ear
Then split the wire so it is figure 8, and split and strip the ends (all four). Now solder the wires to the terminals on the speaker. Then glue the speaker into the coconut.
Step 7: More Wiring and Gluing in the First Headphone
Then split the four core into three core.
Split and strip only one of the ends for now.
Now solder two of the wires onto the other speaker. The other wire will be for the other channel.
Pull the wires from the other headphone through the hole in the top of the other coconut.
Solder the third wire to one of the wires from the other headphone, and the other onto one of the speaker terminals. This will be ground.
Now pull the three core wire through the hole in one of the eyes of the coconut, and this step is finished.
Step 8: The Jack
Sorry I don't have any pictures of the finished solder joint. You'll have to imagine, unless the TV destroyed your imagination, then you're in a bit of a pickle.