Many audio devices (for example, radio, stereo, CD / MP3 players, TVs) have a connector designed to supply external signals - the AUX input. In this article, we will look at the practical use of this socket.
AUX line input
The amplitude of the signal applied to the line input varies in the range from 0.5 to 1 V. This signal level is produced by any musical playback devices that have a line-out connector. It is usually labeled as AUX OUT. The same signal level is applied to the headphones. Therefore, the headphone output can be connected to the AUX input.
Line-in connection
The scope of the mentioned connector is quite wide. So, for example, if you want to listen to music from an MP3 player or smartphone (tablet) through powerful speakers, and not through headphones, you can connect your device to the AUX input of a music center or other similar device. An adapter cable is required for connection. On one side of the cable there should be a 3.5mm jack connector (headphone plug), and on the othersides - a pair of "tulip" connectors. The cord itself must be a four-wire acoustic with an external copper braid. Such a cable can be bought in a store or made by hand. The jack connector can be cut off from non-working headphones or bought at a radio store. When purchasing connectors, you can choose their shape and design - from the cheapest (plastic) to the most expensive (gold-plated metal). When you have found all the plugs and wire, you can start assembling. We clean the insulation at the ends of the wire and solder the connectors to them. The "jake" has the central contacts - signal, and the outer one - a common wire. Tulip is exactly the same. Some devices have a headphone output under the “minijack” standard, in which case you need to solder the appropriate connector. The decoupling remains the same. After that, be sure to check the cable with a multimeter in the "dialing" mode to exclude incorrect connection.
Setting AUX input
So the cord is ready, you can connect our player to the music center. We connect the cable to the AUX line input and turn on the AUX IN mode on the playback device. For digital instruments, this is done through the menu, and for analog instruments, using a switch. It should be remembered that before starting playback on the player, it is necessary to reduce the volume level on the music center or other playback device. This is done so that the device does not “yell” to its fullest if a strong signal is given on the output channel.
Conclusion
According to this principle, you canconnect various devices (laptops, netbooks, MP3 players, DVD players, iPods, tablets, etc.) to devices that contain audio frequency amplifiers - stereos, TVs, home theaters, cassette players, etc. A good connection is obtained when connecting CD/MP3 players and cassette players. The latter are used extremely rarely in the era of digital music, although they sometimes have much better characteristics. So such a bundle gives new life to analog technology.
