Why 4 pins for the speaker connection on motherboards?

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If you like playing graphics-intensive games, you can add a faster video card to one of the expansion slots to get better performance Sound card The sound

candibet slot XLR 5 is used in aviation headsets, where it can supply power for active noise cancellation Prior to the introduction of this standard, the wiring of pins 2

candy mix slot Many sound cards have a PC Speaker header that lets you route the motherboard PC speaker