Many sound-reproducing devices (for example, radio tape recorders, stereo systems, CD / MP3-players, TVs) have a connector designed to supply external signals - AUX input. In this article, we will consider the practical use of this socket.
AUX line input
The amplitude of the signal supplied to the line input varies in the range from 0.5 to 1 V. This music signal level is produced by any music playback devices that have a line output connector . It is usually marked 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 a music center or other similar device. To connect, you will need an adapter cord. On one side of the cable there should be a 3.5mm jack plug (headphone jack), and on the other hand, a pair of tulip jacks. 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 yourself. The jack can be cut off from non-working headphones or purchased at a radio store. By purchasing connectors, you can choose their shape and design - from the cheapest (plastic) to the most expensive (gold plated). When you have found all the plugs and wire, you can proceed with the assembly. We clean the insulation at the ends of the wire and solder the connectors to them. At the “jack”, the central contacts are signal ones, and the external one is a common wire. The “tulip” is all the same. Some devices have a headphone output under the standard "mini-jake", in which case it is necessary to solder the corresponding connector. The wiring remains the same. After that, be sure to check the cable with a multimeter in the "dialing" mode to prevent an incorrect connection.
AUX input setting
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 unit being played. For digital devices, this is done through the menu, and for analog devices, using the switch. It should be remembered that before starting playback on the player, you must reduce the volume level on the music center or other playable device. This is done so that the device does not “yell” to the fullest if a powerful signal is supplied to the output channel.
Conclusion
By this principle, you can connect various devices (laptops, netbooks, MP3 players, DVD players, iPods, tablets, etc.) to devices that contain audio frequency amplifiers - music centers, televisions, home cinemas, cassette recorders, etc. A good bunch is obtained when connecting CD / MP3-players and cassette recorders. The latter are rarely used in the era of digital music, although they sometimes have much better characteristics. So a similar bundle gives a new life to analog technology.