I only had one extra stereo speaker, so I only made it mono. If you have two speakers, just make this twice and you have a stereo amp.
The name of the game here is simple, but feel free to make it more complicated and nicer if you feeling the urge.
I also included steps on how to fit this in a army surplus case and make it a portable amp for your ipod.
UPDATE: I have kits
I have been asked for parts and where to get them a lot since I posted this. If anyone is interested I have kits now with everything you need to build this for $50 + $5 shipping.
Send me a PM with your email address if you are interested.
Step 1: Parts
-Radio Shack Phono(RCA) Jack 274-346 $3.99
-4 small nuts and bolts.
-Radio Shack DC Power Jack - 274-1576 $2.59
-Any old 8-12V wall wart that fits the power jack. $Free
-Radio Shack project box 270-283 $3.99 .
-Velleman 7W Mono Amp K4001 $10.00
If you make the portable model
-2 9V snap connectors 270-324
-2 9v batteries $5.00
-Power switch 275-612 $2.99
-470 ohm resistor
-Army Surplus box ??? I used a signal light box.
-Old computer speaker
-Old earphones or some old 1/8" stereo jack headphone jack.
-Piece of screen
-4 nuts and bolts
Needle Nose Pliers
Step 2: Assemble the Amp.
Step 3: Put It in the Box.
Line up the power jack, rca connector and two nuts on one side of the project box. Make sure there is room and mark the locations. Start by putting in the power connector. Drill a hole for it with the your drill and a 1/.4â bit. Then move on to the RCA connector and do the same.
Now you will drill holes for your speaker jacks. They are just your bolts and two nuts.
Step 5: Done If Not Moving...
Step 6: Going Mobile
Survey your army box and see what you have to work with. Mine included a lamp, which worked! Putting that aside for another project.
Mark the mounting holes for your speakers.
File or dremel the the hole to make it smooth when you are done.
To run this off of batteries solder two 9v battery connectors together, solder the black to the negative on the amp, and the positive straight positive on the amp, I wanted to make this run off of batteries or a wall wart, so I also added a switch and a dc power jack
I cut apart an old pair of headphones and used the cord to connect it to the amp. Cut the cord and tie the white and red cable to the red cable marked IN on the amp. Solder the negative cable to the negative and your are finished.