HOW TO HACK HEADPHONE JACK — The Engineering Knowledge

Engineering Knowledge
5 min readDec 26, 2022


Hello, readers welcome to the new post. Today we will discuss HOW TO HACK HEADPHONE JACK. The headphone jack is also known as an audio jack, jack plug, or phone jack which is a small round phone connector normally used for analog audio signals. It is pin structured structure plug that comes with standard pair of audio headphones.

It is very commonly used in mobiles smart phones and TV home heaters that are non-portable devices. Headphone jacks are very commonly employed for many years and their different types are created for different device connections. In this post we will discuss different types and learn how you can use them in circuits. So let get started

Types of Headphone Jack

  • There are three main types of the headphone jack
  • 6.35mm Headphone Jack
  • 3.5mm Headphone Jack
  • 2.5mm Headphone Jack

6.35mm Headphone Jack

  • 6.35 headphone jack also called a quarter-in jack means the approximate diameter of this jack that 6.35.
  • It was used for the connection of older telephone switchboards and connection of headsets, handsets, and configuration of microphones in a communication system
  • They can be supported the mono or stereo sound function
  • It is an older version but still considered as the best audio jack for some circuits.
  • It is used in AV receivers to make connections of earphones with amplifier and AV receiver
  • It is used in musical instruments such as keyboards, synths and guitars since it supported the mono function
  • Its stereo cord features help to use in audio source to transmit sound in a natural and animated way.

3.5mm Headphone Jack

  • It is a commonly used type of headphone jack that has 3.5mm diameter and is known as a mini-jack.
  • it is a smaller model of quarter-inch jack that is commonly used since supported mono and stereo
  • it also comes with a microphone to support the calls
  • Its small size makes it useful for portable devices
  • it is commonly used for smartphones, computer laptops, and PCs
  • It is used in audio players like cassette players and helps to make calls through microphones

2.5mm Headphone Jack


TS Headphone Jack

  • TS stands for tip and sleeve. Tip and sleeve gave due to the real manufacturing of connection of plug. Tip control the left audio channel that is insulating and sleeves work as ground. TS is a mono headphone jack that has only a single audio channel
  • If we cut the earphone cord then we will see that the headphones configure in wire circuits. TS jack has one copper wire ground sheat wounded through one blue wire

TRS Headphone Jack

  • TRS headphone jack is an audio jack that has three parts Tip, ring and sleeve. This headphone jack have 3.5 diameters.
  • TRS earphones exist on standard headphones that are compatible with stereo sound but do not have microphones.
  • In simple words, TRS supported stereo sound but not supported microphones so not make calls through headphones
  • If we cut TRS into cable we can see three ways through which these jacks can be wired
  • Copper wire ground sheet wounded about 2 insulated audio signal wires
  • Two distinct wires having insulation, every wire has its own signal wire and ground wire at inside
  • Separated wired for ground having insulation, right audio and left audio in a single cable
  • Normally red colored wires are the right audio channel and blue wires are configured left audio channel.

TRRS Headphone Jack

  • TRRS stands of Tip, ring, ring, and the sleeve is 3.5mm headphone jack normally used in headsets with microphones. it supported the both stereo and microphone. It supported the microphones since has an additional ring that can be used for microphones signal
  • It works as the mixed stereo signal is sent to tip through a single audio channel and a ring is used for the microphone signal
  • As compared to TRS, TRRS is attached with an extra cord that is wired through copper wire inner side and red and green connected outside.
  • Internal copper wires is a microphone and the external sheet is the microphone’s ground

Author: Henry

I am a professional engineer and graduate from a reputed engineering university also have experience of working as an engineer in different famous industries. I am also a technical content writer my hobby is to explore new things and share with the world. Through this platform, I am also sharing my professional and technical knowledge to engineering students.

Originally published at on December 26, 2022.



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