Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to make your own speakers [title] Find copper wire, packing tape, and a strong magnet. [step] While there is a lot of calibrating that goes into high end speakers, the basic technology is actually pretty simple. An electrical current is run through a wire that is attached to a magnet.

Ending1: Find copper wire, as you can use flint, water, motor oil, or solvents, and an insulated or ceramic plate. [substeps] Tin and plastic plates are another great choice. Ending2: Some experts recommend spending most of your energy on this magnet. Aside from asking for a shrink-wrap, you could also buy cheap ones that either come pre-wrapped, or you can purchase a free industrial magnet making kit online. Ending3: This current makes the magnet vibrate, and those vibrations are picked up by our ears as sound. [substeps] To hear the sound well you should also get a small plastic tupperware or cup. Ending4: The magnet goes through either around the loops of the microphone wires or in other areas of the dock. [substeps] There are hundreds of ways to charge your speakers.

Answer format: ending1/ending2/ending3/ending4