Introduction: Portable Speaker Box - Skyflakes Edition

Picture of Portable Speaker Box - Skyflakes Edition

Create a passive but powerful portable speaker!

You'll need:
an old guitar/bass amp
a 3.5mm- 3.5mm male to male cable
an mp3 player (Zen recommended- it's loud!)
a Skyflakes box, or some sort of casing that will house your speaker

clamping tool of choice
knives or wire cutters

optional:
electrical tape
belt/strap for handle


no soldering required, but I used electrical tape to secure connections

Step 1: Materials

Picture of Materials

You need:

A speaker magnet from an amp
A 3.5mm- 3.5mm male to male cable
An mp3 player (the Creative Zen is the loudest I've come across- this is important because thses are gonna be a PASSIVE speaker, meaning its got no external power source besides the mp3 player itself)

Step 2: The Amp

Picture of The Amp

Grab an amp magnet from an old guitar or bass amp!

We found a 15 watt amp abandoned outside. Just take the magnet part out. Usually it is screwed in.
The two wires in the back should be red and black. The wires you'll have to cut, but keep the parts of wires that are attached to the magnet itself.

Shown here is the back of the magnet.
My red wire fell off in the scuffle of removing it :/

Take a look at the ohm rating.This one is 8 ohm. The ohm rating on this one is 8. Basically, the higher the ohm value, the more volume the speaker can handle- but the more power it requires.
8 ohm is pretty hefty, considering this thing is designed to handle considerable amounts of guitarage.

Step 3: Cut and Strip the Cable

Picture of Cut and Strip the Cable

Take one side of the 35mm wire and cut off the cable just under the connector.

Now, strip off the rubber housing to expose three wires:

Two colored wires (left and right channels)
The groundwire ( which is very thin and fine in this case)

Step 4: Strip the Channel Wires

Picture of Strip the Channel Wires

The colored wires that you exposed should be stripped as well
I stripped a lot of the casing off because I'm going to tie them around teh contact points instead of using solder because I misplaced my soldering iron >.

Step 5: Twist

Picture of Twist

Twist the actual wires together
twist the groundwire to make it one rope
and twist the left and right channels together to make one thick connector wire

Step 6: Connect to Contact Tabs Behind Magnet

Picture of Connect to Contact Tabs Behind Magnet

I tied the groundwire to black
and the channels to the red side
note: the red wire fell off but thats ok because all you really need is for the metal to touch.

Tie them together and then clamp it with the tool of your choice

Step 7: Test It!

Picture of Test It!

Now that the connectors are in place, test it out using your favorite ( and hopefully loud) mp3 player
I use the Zen, because for some reason, it outputs more volume and even has a bass boost.

Check to make sure both left and right channels are coming through.
A good way to check is to play a song that has sounds that alternate between the left and right speakers.

Step 8: Put It in a Case!

Picture of Put It in a Case!

Now for the speaker "box"
I found that a Skyflakes box works with a medium-sized amp speaker magnet.
But feel free to try any case you like.
There is an instructable that featuresa tin can speaker.

I punched and cut a hole in the side to thread the 3.5 wire thru, as well as cutting a hole in the bottom to let some bass out.

Step 9: Secure and Fit!

Picture of Secure and Fit!

I used electrical tape!
You can use solder or even tiny alligator clips to secure the connections.

Now you can fit your speaker into your case!

Thread the 3.5 wire through th hole you created on the side

you can also put on a an optional covering
I cut this circle from material on the the amp the magnet came from

Step 10: Enjoy! Options

Picture of Enjoy! Options

Fine tune your speaker, personalize it, make it yours.

Optional:
Electrical tape to secure the wire near the hole on the side of the box
Use a belt or similar strap for a handle
Personal graffitis etc

You can now carry around your own personal speaker. yess!

Comments

keiou (author)2010-09-26

@Nimrodcon, if you want to make active speaker or powered speaker you'll need to add an amplifier. Google for op-amp or LM386.

keiou (author)2010-09-26

@Hammerhead46 sky flakes is a brand of biscuit, sold here in the Philippines. I'm not sure if it's being sold internationally though.

Hammerhead46 (author)2009-01-27

What are "SKY FLAKES"? And where do they sell them? I would like some of those "Boxes" for other things but they don't sell anything like it in RURAL AZ USA.

Nimrodcon (author)2008-08-17

Oh I see...thanks man. Hey, I was looking at commercial speakers today, and I noticed they were all 8 ohm, why is it? Stability purposes? Also, I wanna learn how to make this thing active.

jinventive (author)2008-08-15

Just pointing out that the thing that you called a magnet is actually a speaker but you are correct in saying it has a magnet on it. Also 8ohms is an impedance in other words the resistance of the speaker. A lower resistance will give higher volume with an MP3 player as it doesn't have to push as hard to get the sound through the speaker. The wattage (w) is the power that the speaker can handle. Don't confuse impedance with wattage.

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