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New_Equivalent_8846 t1_j6ix02r wrote on January 30, 2023 at 5:38 PM

Reply to comment by Iminlesbian in eli5: Why do most airlines still use 2-pin audio jacks for the in-flight entertainment systems on their planes? by JJGLC92

No, if you mix down a stereo signal to one channel it becomes mono audio. If you then send that channel to 2 headphones or speakers it's still a mono signal; ie you get the same signal in both ears.