Headphone Jack
Headphone interface
A brief introduction to the interface for headphones in the existing market
When using portable electronic products, especially when using portable players and headphones, the first problem I face is the connection cable. Apart from the power cable, the rest is audio-related wiring problems. Then the first problem I encountered is the headphone interface problem.
Now let’s introduce the different interfaces:
Headphone plugs usually come in four sizes: 3.5mm, 4.4mm, 6.5mm, and 2.5mm. The most common thing we are the 3.5mm interface.
3.5mm interface
The 3.5mm interface usually has three rings, TS, TRS and TRRS. The meaning of TRS is that Tip (signal), Ring (signal), and Sleeve (ground) represent the three contacts of this interface. What we see are three or four metal columns isolated by two or three insulating materials.
TS 3.5mm
The two-core TS interface can be used to transmit unbalanced mono audio signals. For example, the wire used for electric guitars is the two-core TS cable.
TRS 3.5mm
3.5mm TRS, more people know about the TRS interface, because most headphone interfaces are now 3.5mm TRS. From top to bottom, there are the left channel, the right channel and the ground, which is compatible with most mobile phones and portable players (DAPs).
From top to bottom, they are: left channel, right channel, and ground.
TRRS 3.5mm
3.5mm TRRS, headphones with wired control functions, are generally four-stage TRRS. In addition to the left channel, right channel and grounding, there is also a section used to transmit microphone signals. However, 3.5mm TRRS is also divided into two types: CTIA and OMTP.
::: Info [CTIA] From top to bottom, they are: left channel, right channel, ground and microphone. :::
From top to bottom, they are: left channel, right channel, microphone and ground.
4.4mm interface
The 4.4mm interface is usually a 5-segment balanced headphone interface, including the positive and negative poles of the left and right channels and the grounding.
From top to bottom, the left sound channel is positive, the left sound channel is negative, the right sound channel is positive, the right sound channel is negative, and the ground is connected.
2.5mm interface
2.5mm TRRS, a balanced output connection method used by some portable players (DAP).
From top to bottom, the right sound channel is negative, the right sound channel is positive, the left sound channel is positive, and the left sound channel is negative.
6.5mm interface
6.5mm: three-stage design, from top to bottom: left channel, right channel, and ground. It usually appears on big ears.
From top to bottom, they are: left channel, right channel, and ground.