It's the place where you plug in the speaker wire. Speaker wire runs to the speaker allowing the electrical signal to operate the speaker or headphones. The speaker wires are fitted with a special kind of plug that will fit the speaker jack.
Many computer manufacturers position the speaker jack in unique places. A few put the speaker jacks on the front of the computer, some put them on the back, laptops generally put the speaker jack on the side.
The 12 Jack Hammer Speaker
In general, the speaker jack on a CPU will be ringed in green and/or have a small headphone symbol alongside it.
Narrator
public speaker
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public speaker
You can connect a 14 speaker jack to a home tuner stereo receiver using the RCA connector.
A 14 speaker jack can be connected to a stereo tuner music receiver via an RCA connector.
There is no jack that would allow it to be connected to a third party speaker system.
TRS is the name of the type of connector (e.g. 1/4"/6.3mm jack) and speaker cable is exactly what it is, speaker cable.
a definition of a compound word is jack-ass.
It is a jack specifically made to lift a transmission of a vehicle.