Jack

December 2016

Jack

The "jack" is without a doubt the most commonly used connector for small-scale audio equipment. Jacks are normally divided into three different types, based on their diameter:

  • 2.5 mm jack: The smallest jack;
  • 3.5 mm jack: The traditional jack, which corresponds to a headphone jack;
  • 6.35 mm jack: The jack used for semi-professional sound systems, in order to connect speakers, amplifiers, or microphones.

There are two versions of each of these jacks:

  • Mono jacks, for sending monophonic sound. This kind of jack has two contacts: a reference, found on the body of the cord, and the signal on the tip.
  • Stereo jacks, for sending stereophonic sound. This kind of jack has three contacts: The same two as its mono counterpart, as well as an additional ring for sending another audio channel.

Jack

In computer sound cards, the plugs for jacks are generally color-coded so users can easily tell which type of audio device each one connects to, and whether they are audio inputs or outputs.

Jacks


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