How do I connect my soundbar to my TV using 3.5 mm line out?
RCA to 3.5mm cable
The connection process is very easy. The 3.5mm connector has to be inserted into the “line out” port on your TV. The red and the white RCA connectors have to be inserted into the red and the white ports on your soundbar.
Using HDMI ARC does not require a new HDMI cable. Any HDMI cable should be able to cope with the requirements - it's only when we move on to eARC this could (potentially) become an issue.
While it may look exactly the same as the other HDMI inputs, you may be asking yourself if you need a special HDMI cable for HDMI ARC, you're not the only one. There is no such thing as an HDMI ARC cable. Any HDMI cable will work universally for HDMI and HDMI ARC/eARC ports.
To connect your TV with an ARC enabled speaker, make sure that you are using an HDMI cable 1.4 or higher. The HDMI-ARC functionality is only available through the specific port on the TV or One Connect Box, and the external speakers need to be compatible.
So which one is better? HDMI ARC or digital optical audio? HDMI ARC is a better option. It supports Dolby Digital Plus, Dolby Atmos, and up to 7.1 channels of uncompressed audio while Digital Optical only supports Dolby Digital and up to 5.1 channels of uncompressed audio.
What to do if my TV doesn't have an HDMI port labelled ARC? You can use an Optical Audio cable or Aux cable to connect the sound bar to the television.
Sadly, no. ARC is designed to convey audio from the HDMI input of an ARC-capable TV back to the HDMI output on an ARC-capable receiver, traveling in the reverse direction compared with the normal signal flow from the receiver's output to the TV's input.
HDMI ARC: Possible disadvantages
It can handle both the TV's regular two-channel audio and 5.1 surround sound without any trouble. But it also has the same limitations as the S/PDIF standard it replaces. Namely, it can't send HD or high-bit-rate audio used by standards like Dolby Atmos and DTS:X.
Connect to a TV that is not compatible with the ARC (Audio Return Channel) function using the HDMI cable and audio input cable. Connect your TV with an HDMI connector to HDMI OUT (ARC) connector on your HEOS AVR using the included HDMI cable.
Thanks for your question. It is possible to convert the digital audio output from a TV's HDMI ARC (Audio Return Channel) output into an analog stereo signal using an outboard digital audio converter, but these components can be a little flakey.
What is the difference between HDMI ARC and HDMI eARC?
The main differences between ARC and eARC lie in bandwidth and speed. The enhanced version of the Audio Return Channel has a much higher bandwidth than its predecessor. Bandwidth represents the range of frequencies or amount of data that is being transferred at a time.
A lot of TVs will not let you connect both HDMI and optical cables at the same time, even if they have both of these ports available. In case you do connect both cables, they will automatically switch to the one you inserted last.

- Connect one end of the audio cable to the AUX IN jack on the bottom of the soundbar.
- Connect the other end of the audio cable to the AUDIO OUT jack on the external device. ...
- Press the Source button on the soundbar or the remote to change the mode.
- Set the soundbar to AUX mode.
Some TV's come with a 3.5 mm output jack. This is the same kind of connection that is used in headphones. Simply plug one end into the TV and the other into the soundbar. If your soundbar doesn't have a 3.5 mm input, you can get an AUX to RCA cable (on Amazon).
Connect one end of the HDMI cable (sold separately) to the HDMI IN port on your TV. Connect the other end to the TV OUT (ARC) port on your sound bar. Then, connect an optical audio cable from the TV's Optical digital audio out to OPTICAL IN on your sound bar (this is necessary to hear the TV audio).
3.5 mm auxiliary connectors are supported by many of the soundbars on the market today. Aux ports on soundbars make it easy to connect to other devices. If your TV has an aux port, all you'll need is an aux cable to connect to it.