Phone connector

[ phone jack, phone plug, TRRS, TRS, and TS ]

A phone connector—not to be confused with the phono connector—is a plug and jack combination used for analog audio signals. The phone plug consists two or more electrical contact points. A “TS” connector has a metallic tip and sleeve enabling two electrical contacts. The “TRS” connector adds a metallic ring for a third contact and the “TRRS” adds an additional ring, for a total of four contacts.

The phone connector gets its name from its original use on telephone switchboards, beginning in the late 1800s. It is still widely used today in both consumer- and pro-audio equipment owing to its durability, withstanding repeated connects and disconnects.

The three sizes of phone plugs are 1/4 inch (6.35 mm), 1/8 inch (3.5 mm), and the less common 1/10 inch (2.5 mm).


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  • Created: 2022-12-20 03:23
  • Revised: 2022-12-22 01:35
  • Post type: docs
  • Category: Audio
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