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In this Instructable you will learn how to make a pair of tennis ball speakers.
These are very easy to make, it took me 15 minutes on my first ones.

WHAT YOU NEED;

9v battery
9v battery clip
a tennis ball
An amp taken out of computer speakers
https://www.instructables.com/id/Super-easy-to-make-portable-speakers-for-mp3ipod ( look at this for how get a small amp. The smaller the better)
Small box to fit in your small amp
Glue
an old set of headphones
2 speakers with a diameter of no more than 5 and a half centimeters
10 cm of velcro

Lets get started............................

Step 1: Open the Tennis Ball

Get your tennis ball and draw round it so it is in half.

Than take something such as a pen knife or stanley knife and carefully cut the tennis ball open.
You then have two halves of a tennis ball.

Step 2: Holes

Punch small holes at the back of the tennis ball on each side with scissors or a stanley knife for the wire to go through

Step 3: Wires

Cut your old set of headphones just underneath the earpiece.
Strip off an inch of the plastic casing at the top
Feed one through the hole in one half and the other in the other half

Step 4: Soldering

Then correctly solder the wires to the right speakers. Making sure you do not burn the tennis ball.

Step 5: Finishing Off

Carefully pull the wire through the tennis ball to bring the speaker into place. If you wanted you could glue the edge of tame of the speaker to the side of the tennis ball.





Step 6: Velcro

Cut your velcro in half. One for each side of the tennis ball. Then on half of the velcro cut the furry side in half. As shown in the picture.

Then with the furry sides glue to the tennis ball where the two halfs meet. Look at picture if you need more help.

Do this on two section of the tennis ball one on the opposite side to the other.

Step 7: Amp

Get your amp and find a suitable size box for it. For mine I used a treasury tag box.

Firstly mark out were you will need to put holes for the buttons and switches. Then carefully cut them make holes in the box with a pencil or something. Slide in the circuit board making sure that all buttons are carefully aligned. Glue the board to the box so the board does not slide about.

Step 8: Battery

Slide the battery connected to the amp into the box. Do not glue this down because you will want to change the battery at some time. Make sure you have a small gap on one side of the box for the wires to go through.

Close up the box.

And try it.

Any constructive criticism welcome. : )
Where do you attach the battery to? My speaker amps are designed for household 120AC power, how do I get it to use a small DC battery? <br> <br>We're trying to make speakers for a class science project. Thanks!
You could but velcro or something around the cut edges of the tenis balls so then you can stick them together for when you are just carying them around, but not listning to them.
isnt that what he did??? lol and does the tennis ball amplify the sound ???
If it has a slight hole in the back it means air can move behind the speaker. This makes it to appear louder. If you have ever taken a speaker out its cabinet it doesn't work as well but when you put it back in you get the full sound. This is because it moves the air. <br> <br>So yes it does make a bit of a difference. <br>
Ilikethe idea!!Thanks
where did you get the amp from ? did you get it out of pc speakers?
I got it out of a set of computer speakers and converted the power sorce to run off a battery.<br/><br/>Have a look at my instructable for more information<br/><br/><a href="https://www.instructables.com/id/Super-easy-to-make-portable-speakers-for-mp3ipod/">https://www.instructables.com/id/Super-easy-to-make-portable-speakers-for-mp3ipod/</a><br/><br/>thanks <br/>matt<br/>
aweomeness
If you like it then please vote for it when the voting opens : )
Thanks
The speakers could be glued in and the box made of something sturdier. But its still pretty cool.
I thought of that but that was the only box I could find lying around. Thanks
Nowdays, the term "portable" can be used for almost anything.
HOW??? is that not portable????? Its a tennis ball!!!!!!!!!!!!!!
It is.... but as I said, almost anything could be considered portable. You don't need to add it to the name....
Pocket sized then. Portable on your person.
AND thats it

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Bio: Why do I always find myself making things when I should be doing work???
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