Turn an Old Telephone Handset into DJ Headphones!

Step 2 Expose Some Wires

Now carefully remove about 1/4 inch of cable jacket from your cut end with the blade to expose four wires. Two white ones, one red one and one black.

You can trim off the black and red wires, we won't be using them here. They carry the signal from the mouthpiece back to the base. You can hook these up to a simple electret preamp and have your own telephone microphone instead.

Carefully remove about 1/8 inch of cable jacket from the ends of the two exposed white wires. Be extra careful because in this case anyway, the wire inside was just this flimsy flat copper coil stuff.