Optical audio can sound great, but how do you wire an optical cable to your system? Learn how to connect an optical cable to your TV, soundbar and home theater.
Optical audio connections can be a great way to improve the audio for movies and TV shows.
When it comes to better sound, your TV speakers aren’t going to cut it. Therefore, the best way is to connect your TV to a soundbar or home theater system.
There are several ways to do this, but if your equipment has optical audio connections, this can be a great way of wiring everything together.
While using optical audio to plug in your gear is relatively easy, there are a couple of gotchas that you should know.
So follow this guide and learn how to plug in an optical audio cable to your TV, home theater system, cable box or soundbar.
Table of Contents
- How to Plug in an Optical Cable
- Check if the Optical Output Connector Has a Protective Cap
- Find the Optical Input Connection on Your Home Theater Amplifier or Soundbar
- Connect the Optical Audio Cable to Your TV or Cable Box
- Connect the Optical Audio Cable to Your Amplifier or Soundbar
- Turn on Your TV or Cable Box
- Turn on Your Amplifier or Soundbar
- Which Optical Cable Should You Buy?
- Frequently Asked Questions
How to Plug in an Optical Cable
Whether you connect your TV to a soundbar or home theater system, the basic steps are similar. And, the source doesn’t have to be a TV – you can also connect a Blu-ray player, DVD player or cable box to a sound system with optical audio.
Remember, your TV, Blu-ray player, or cable box will need an optical output. And you will be connecting these to a soundbar, home theater or amplifier with an optical audio input.
However, connecting an optical cable is easy if you follow these simple steps:
Total Time: 5 minutes
1. Check if the Optical Output Connector Has a Protective Cap
Some optical ports have a protective cap for when they aren’t being used.
If your TV has one of these – pull it out. Put it somewhere safe in case you stop using the optical connection in the future.
Other TVs might simply have a protective door, which will move out of the way when you push the cable in.
The same is true if you are connecting a cable box or DVD player – make sure the protective cap is removed.
2. Find the Optical Input Connection on Your Home Theater Amplifier or Soundbar
As with your TV, check that the optical input on your soundbar or amplifier has no plastic plug in place.
If it has, then remove it. If not, you should be able to plug in the cable easily.
3. Connect the Optical Audio Cable to Your TV or Cable Box
Some cables also have a protective cap, so remove this before you try and plug it in.
Connect one end of your optical audio cable to the optical output on the rear of your TV. Just make sure that you match the shape of the cable’s connector with the connection on your device.
The design of an optical port means it will only plug in when you line it up correctly. Don’t force it.
When you align it the correct way, it will snap into place quite easily.
4. Connect the Optical Audio Cable to Your Amplifier or Soundbar
Run the optical cable from the TV or cable box to your amplifier or soundbar.
Locate the optical audio input on the rear of your home theater system and plug the cable in.
There may be more than one, so make a note of the label – in this case, AV1 and AV4.
This will help you select the correct audio source later.
Again, the cable’s connector will only fit one way, so line it up with the shape of the port.
Try to avoid tangling it with other wires in your system.
5. Turn on Your TV or Cable Box
Go to the TV’s audio menu and ensure that the audio output is set to ‘digital out.’
On some models, the optical output may work without enabling it in the audio menu. In this case, it is usually a good idea to disable the TV speaker in the audio menu.
A cable box will often have the optical port enabled already, but if you get no sound, check the audio menu for the box and see if the digital output needs switching on.
6. Turn on Your Amplifier or Soundbar
For an amplifier, select the correct audio input source. This will be the optical port that you connected previously.
There may only be one, but some systems have multiple digital inputs, so make sure that you select the right one.
A soundbar will usually only have one optical input, and it should work without selecting any inputs.
- 1x male-to-male optical digital audio cable
- No tools required – maybe some cable ties to tidy the wires after
Which Optical Cable Should You Buy?
You don’t need to spend a fortune on an optical cable.
Buying a very cheap wire might result in connection problems due to poor construction, materials and quality control.
However, at the same time, you don’t need to spend an excessive amount either, as it won’t sound any better.
The only time where spending a little more is sometimes worthwhile is if you are looking for a very long cable run.
For short runs, almost anything should do.
Here are some popular optical cables that should do the job just fine.
Apart from the price, some factors to consider are the available cable lengths and the materials used for the shielding and connectors.
- Size: 3 feet to 100 feet
- 24K gold-plated connectors
- Flexible PVC jacket
- Size: 3.3 feet to 15 feet
- Slim braided cable
- Flexible design for easy install
- Size: 3 feet to 20 feet
- Great value
- Ultra-thin cable
Frequently Asked Questions
What if Your TV Does Not Have an Optical Output?
If you need to connect to a sound system that only has an optical input, then you will need to buy an audio adapter to convert the audio that your TV does support. You can purchase coaxial digital audio to optical converters. Or HDMI audio extractors to convert HDMI audio to optical. You can even get converter boxes to change stereo RCA analog audio to optical audio.
Can You Use HDMI and Optical Audio at the Same Time?
It depends on the device. Most devices will send audio through their HDMI and optical outputs at the same time. If not, you could buy an HDMI audio extractor, which will allow you to take the HDMI audio and output it in different audio formats. This will enable you to connect to other devices.
Is It Better to Connect Your Soundbar with HDMI or Optical?
If you have a choice, then it would usually be best to connect a soundbar with an HDMI connection. This is mainly because HDMI connections allow for more audio formats, and you can control your devices using HDMI CEC commands. However, an optical connection will be fine if you just need stereo audio or Dolby Digital and DTS 5.1 surround sound.
About The Author
Paul started the Home Cinema Guide to help less-experienced users get the most out of today's audio-visual technology. He has been a sound, lighting and audio-visual engineer for around 20 years. At home, he has spent more time than is probably healthy installing, configuring, testing, de-rigging, fixing, tweaking, re-installing again (and sometimes using) various pieces of hi-fi and home cinema equipment. You can find out more here.