4 Pole Jack Pinout and Wiring

This 4-pole jack plug pinout is for modern Android and Apple smartphones that follow the modern standard. Newer equipment such as PC headsets, gaming headsets, and headphones for mobile phones usually follow this wiring scheme. You will also find it on the iPhone, iPad, Kindle Fire, Razer Blade, Macbook Pro, or the newer Ultrabooks.

If your headphone set requires the jack plug replacing, one possible way to determine the system it uses, providing one channel is working, is to measure the resistance of the driver coil. If the right-channel still works, then you should be able to measure the resistance between ring 1 and ring 2. If the left-channel is working, then resistance should be between the tip and ring 2. Logically, if ring 2 is used for audio in your headphones, then the microphone connection has to be on the sleeve.