What does AUX in a car mean?

2 Answers
DakotaDella
07/24/25 2:53pm
AUX is an audio input interface. The basic working principle of the AUX interface is that after connecting to the AUX interface, the audio in electronic products can be connected to the car audio through the headphone jack and AUX interface, and the audio can be played in the car audio broadcasting facilities. The USB interface can be used to insert a USB flash drive to play audio. When using it, insert one end into the AUX interface and connect the other end to a video player such as a mobile phone, MP3, or MP4. This allows you to listen to songs or niche music anytime, anywhere, without being limited to car music CDs. However, if the playback device runs out of power, the music will also stop (the interface is generally a 3.5mm labeled headphone jack). Aux is the abbreviation for Auxiliary, which is an additional signal line design. On general audio equipment, in addition to the official output and input terminals, there are often several terminals labeled Aux as backup connection terminals. When there are special applications, such as requiring additional audio output or input, these terminals can be used. These backup terminals or lines, whether for input or output, are collectively referred to as Aux. Function: The AUX port is an asynchronous port, mainly used for remote configuration, dial-up connections, and can also be connected to a MODEM via a transceiver. It supports hardware flow control. The AUX port and CONSOLE port are usually placed together because their respective applicable configuration environments are different. The AUX interface establishes a command-line connection method between the user and the device, allowing operations that are usually impossible in user mode, such as initialization, restoring initial configuration, and correcting abnormal user modes. It provides a fixed port for the device, which can be used as a regular asynchronous serial port with a maximum speed of 115200bit/s. Using the AUX interface, remote configuration and line backup functions for hardware products can be achieved. Note: When using the AUX interface, make sure to buy the correct connecting cable and avoid plugging the audio cable into the wrong port. It is best to follow the steps in the product's user manual when using the AUX interface. If you still don't know how, you can consult the product's official website or call for assistance.
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MacVivian
08/11/25 8:33am
Remember looking for that Aux-in port in the car? It's like a secret passageway that lets me easily connect my phone to the car's audio system to play my favorite music or podcasts. Usually a small round hole, just plug in a regular headphone cable, super convenient for long drives to replace boring radio content. I use it for Spotify, and it totally changes the in-car atmosphere—but don’t forget to bring the cable, or you’ll miss out on the fun. Some cars also come with USB or Bluetooth, but Aux-in is simpler and more direct, no charging needed and no signal interference. I recommend new drivers try this feature more—it definitely enhances the driving experience and lets you share songs with family and friends. Though recently I’ve noticed it’s a bit outdated, newer models might phase it out, but old-school car enthusiasts still find it classic and practical.
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