To learn how to connect a soundbar with an AUX cable, run a stereo 3.5mm cable from the TV’s headphone or Audio Out jack to the soundbar’s AUX In or Analog In jack. Select the soundbar’s AUX input, set the TV at a moderate volume, and fine-tune both levels for clean sound. This simple analog method works well with many older TVs.

Check the labels before connecting

A 3.5mm socket can be an input, an output, or a service connection. On the TV, look for Headphones, Audio Out, or a headphone symbol. On the soundbar, look for AUX In, Analog In, or Line In. Do not use microphone, service, or IR sockets even if a plug fits.

AUX carries two-channel analog sound. It does not carry HDMI control or advanced digital surround formats. If both products support a digital connection, review our soundbar connection comparison before choosing analog.

Connect the AUX cable step by step

  1. Lower the TV and soundbar volumes, then switch both devices off.
  2. Push one end of the 3.5mm stereo cable fully into the TV’s headphone or audio-output jack.
  3. Push the other end into the soundbar’s AUX or analog input.
  4. Turn on the TV and soundbar.
  5. Select AUX, Analog, or Line on the soundbar.
  6. If the TV asks, choose Headphones, Audio Out, or External Audio.
  7. Set the TV near 50 percent, play dialogue, and raise the soundbar gradually.
AUX soundbar connection from television headphone audio out to soundbar analog input
A complete OUT-to-IN path and sensible volume staging prevent most AUX problems.

Balance TV and soundbar volume

Most headphone outputs are variable, meaning the TV volume affects the signal entering the soundbar. If the TV is too low, the soundbar may add hiss as you turn it up. If the TV is too high, loud passages may distort. Start around the midpoint, raise the TV until the signal is clear, then use the soundbar for everyday adjustment. If the TV offers Fixed or Variable output, Fixed usually means the soundbar controls all volume.

Fix common AUX problems

  • No sound: confirm OUT on the TV, IN on the soundbar, select AUX, and insert both plugs completely.
  • Sound from the TV only: choose headphones or external audio in the TV’s sound menu.
  • Hum or buzz: separate the cable from power bricks, test a shorter shielded cable, and power both products from the same strip.
  • Only one speaker channel: clean and reseat the plugs; replace the cable if the fault moves when ends are swapped.
  • Lip-sync delay: turn off heavy sound processing and reduce any AV Sync adjustment.

For matching 3.5mm ports, compare a shielded stereo AUX cable. If the soundbar has red-and-white inputs instead, use a 3.5mm-to-RCA stereo cable. For a higher-capability option, see how to connect with HDMI ARC.

Frequently asked questions

Is AUX better than Bluetooth?

AUX avoids wireless pairing and may reduce delay, but both are normally stereo. Bluetooth removes the signal cable; AUX is often simpler and more consistent.

Why do the TV speakers turn off when I insert the cable?

Many TVs automatically mute their internal speakers when a headphone plug is detected. This is normal behavior.

Can I use a mono 3.5mm cable?

Use a stereo TRS cable with two insulating rings. A mono plug may lose a channel or produce incorrect sound.

Still need help choosing a connection or troubleshooting your setup? Try the AAHE Gadget Wiz for guided help with your TV, soundbar, cables, and settings.

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