I saw these beautiful horns (Indian taxi horns, minus rubber bulb) at the market going for $20, I saw the chance for a new kind of sound from my iPhone! The horns on this device look a bit like snails eyes on stalks! If you like this I have created other artefacts which I don't have instructables for but they might give you more ideas. Click here.
Step 1: The box!
First find yourself a nice box you want to put the electronics in, the box I chose is quite small as you can tell by the phone on it. Of course there will be plenty of sanding involved and lots of varnishing - I love to use Danish Oil, it takes many more coats to give it a great finish, but it's worth it! This box soaked up the varnish like a sponge, I ended up using 11 coats!
The covering inside used up most of the space inside so I removed this and will keep for a later project!
Step 2: The horns!
Find yourself some good brass horns to fit on your box. These I found at the markets in a pretty rough condition, nothing that a bit of TLC can't solve! As you can see they are hand made and come all the way from India, the horn on the left has the makers mark. They are both slightly different from each other so will not look symmetrical.
Cut and polish your horns to suit your enclosure.
Step 3: Adding the electronics
I couldn't find an amp small enough in my junk box to fit this box so I went out and bought one, it's only mono....but.....it'll do! Take it apart and rehouse it in your box.
The 8ohm speakers were bought at the same time.
Step 4: Squeeze everything into your box
It was a tight fit but as you can see I got everything in!