eli5: Why do most airlines still use 2-pin audio jacks for the in-flight entertainment systems on their planes?

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eli5: Why do most airlines still use 2-pin audio jacks for the in-flight entertainment systems on their planes?

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Anonymous 0 Comments

it was the standard at some point.

It costs money to replace them.

but now most planes have a 3.5mm jack in the entertainment system

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