3 pin stereo plug connector layout
3 pin stereo plug connector
at the cable
used in various audio hardware, including computer audiocards

A TRS connector (tip, ring, sleeve) also called an audio jack, phone jack, phone plug, jack plug, stereo plug, mini-jack, mini-stereo, or headphone jack, is a common analog audio connector. It is cylindrical in shape, typically with three contacts, although sometimes with two (a TS connector) or four (a TRRS connector).

It was invented for use in telephone switchboards in the 20th century and is still widely used, both in its original ¼″ (exactly 6.35 mm) size and in miniaturized versions: 3.5 mm (approx. 1/8″) and 2.5 mm (approx. 3/32″). The connector's name is derived from the names of three conducting parts of the plug: Tip, Ring, and Sleeve.

TRS connector typical pinout for audio plug

Name Position Number Most common Colour
L (Left Signal) Tip 1 Green
R (Right Signal) Ring 2 Red
GND (Ground) Sleeve 3 Bare Copper

Some common uses of jack plugs and their matching sockets are:

  • Headphone and earphone jacks on a wide range of equipment. 1/4″ plugs are common on home and professional component equipment, while 3.5 mm plugs are nearly universal for portable audio equipment. 2.5 mm plugs are not as common, but are used on communication equipment such as cordless phones, mobile phones, and two-way radios.
  • Consumer electronics devices such as digital cameras, camcorders, and portable DVD players 
  • Microphone inputs on tape and cassette recorders. 
  • Personal computers, sometimes using a sound card plugged into the computer. Stereo 3.5 mm jacks are used for: Line in (stereo), Line out (stereo), Headphones/loudspeaker out (stereo),Microphone input  
  • Electric guitars. Almost all electric guitars use a 1/4″ mono jack (socket) as their output connector.  
  • Instrument amplifiers for guitars, basses and similar amplified musical instruments.  
  • Line outputs.
  • Foot switches and effects pedals.  
  • Effects loops, which are normally wired as patch points.
  • Electronic keyboards use jacks for a similar range of uses to guitars and amplifiers, and in addition
  • Sustain pedals.
  • Expression pedals.
  • Electronic drums use jacks to connect sensor pads to the synthesizer module or MIDI encoder. In this usage, a change in voltage on the wire indicates a drum stroke.
  • Modular synthesizers commonly use monophonic cables for creating patches. 
  • Some small electronic devices such as audio cassette players, especially in the cheaper price brackets, use a two-conductor 3.5 mm or 2.5 mm jack as a DC power connector. 
  • Some photographic studio strobe lights.  
  • Some cameras (for example, Canon, Sigma, and Pentax DSLRs) use the 2.5 mm stereo jack for the connector for the remote shutter release (and focus activation); examples are Canon's RS-60E3 remote switch and Sigma's CR-21 wired remote control.
  • Some miniaturized electronic devices use 2.5 mm or 3.5 mm jack plugs as serial port connectors for data transfer and unit programming. The second-generation iPod Shuffle from Apple has a single TRS jack which serves as headphone, USB, or power supply, depending on the connected plug.  

 

Color codes of computer soundcard audio jacks

These codes were standardized by Microsoft and Intel in 1999 for computers as part of the PC99 standard. 

green TRS 3.5 mm stereo output, front channels or headphones
black TRS 3.5 mm stereo output, rear channels
grey TRS 3.5 mm stereo output, side channels
gold TRS 3.5 mm dual output, center and subwoofer
blue TRS 3.5 mm stereo input, line level
pink TRS 3.5 mm mono or stereo microphone input

 

Is this document correct or incorrect?.
There are 57 reports in our database: 53 positive and 2 negative.
PinoutsGuide.com > Audio / Video hardware connectors > Pinout of 3.5 mm or 6.25 mm Stereo Telephone plug and layout of 3 pin stereo plug connector
This page contain parts under Copyright © 2000-2014 by pinouts.ru team.
No portion of this webpage may be reproduced in any form without providing visible HTML link to PinoutsGuide.com . Webmaster permission required in any other cases.
Efforts have been made to ensure this page is correct, but it is the responsibility of the user to verify the data is correct for their application.