What are the analog audio interfaces?

Analog interface occupies a large proportion in the audio field. Common analog input and output interfaces are: TRS interface (large/small three-core), RCA lotus head, XLR Canon mouth, etc.

　　 1. TRS interface

　　 TRS means Tip (signal), Ring (signal), Sleeve (ground), respectively, representing the three contacts of this connector. What we see is three sections of metal posts separated by two sections of insulating material.

In fact, the most common thing we see in daily life is the TRS interface. The appearance of its connector is cylindrical, usually in three sizes: 1/4" (6.3mm), 1/8" (3.5mm), and 3/32" ( 2.5mm).

　　 For most people, the 3.5mm TRS interface should be the most commonly used, that is, the interface size of most headphones. The 6.3mm connector is more common on many professional equipment and high-end headphones, but now many high-end headphones are gradually starting to use 3.5mm connectors. The 2.5mm TRS connector used to be popular in mobile phone headsets, but now it is rare. The headphone jack is basically "unified" by the 3.5mm jack.

　　 2. RCA interface

　　 RCA interface is also very common in our daily life, basically on speakers, TVs, power amplifiers, DVD players and other equipment. It is named after the English abbreviation (RadioCorporaTIonofAmerica) of the American radio company. In the 1940s, the company introduced this interface to the market and used it to connect phonographs and speakers. Therefore, it is also known as the PHONO interface in Europe. The connector we are more familiar with is called "lotus head".

　　The RCA interface uses coaxial transmission of signals. The central axis is used to transmit signals, and the outer contact layer is used for grounding. Each RCA cable is responsible for transmitting one channel of audio signal. Therefore, according to the actual needs of the channel, the number of RCA cables matching it can be used. For example, to set up two-channel stereo requires two RCA cables.

　　 3, XLR interface

　　 XLR interface, commonly known as "Canon". The XLR plugs we usually see are 3-pin, of course, there are also 2-pin, 4-pin, 5-pin, and 6-pin. For example, in some high-end earphone lines, we will also see four-pin XLR balanced connectors. The XLR interface can be used to transmit audio balanced and unbalanced signals, but from the interface, we can't see which signal it is transmitting.

If you want to know more, our website has product specifications for analog audio interfaces, you can go to ALLICDATA ELECTRONICS LIMITED to get more information