aguyjustaguy t1_j6l5mj7 wrote
Reply to comment by AssesAssesEverywhere in eli5: Why do most airlines still use 2-pin audio jacks for the in-flight entertainment systems on their planes? by JJGLC92
I remember you could put your head next to the port and hear the very low audio coming out of the arm. The tubes just amplified it to your ear.
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