Whenever I see a headphone plug, it has lines on it, those being from a number of 1 to 3. Why is this?
In: 20
Lines are there to isolate different conductors
1 line – 2 conductors = 1 channel (one ear + ground)
2 lines – 3 conductors = 2 channels (left ear, right ear + ground)
3 lines – 4 conductors = 2 channels + microphone (2 ears + microphone + ground)
Just for added info they’re called “Tip and Ring”, “TRS” (Tip, Ring, Sleeve), and “TRRS” (Tip, Ring, Ring, Sleeve) connectors for 2, 3, and 4 conductor connectors respectively.
I think people have covered it already but basically 1 ring is mono, two is stereo and 3 is stereo + microphone
I actually helped someone out on the techsupport subreddit for this. They had a desktop pc with a separate microphone and headset port, while their headset had a single 3 ring jack
The desktop PC inputs werent capable of using the single cable with 3 rings so you can get a splitter to split it into two jacks if you need
The one with 3 lines is called a qudrapolar mini plug…at least that is what I was taught 20 years ago…
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