Which connection method is better – HDMI ARC or optical cable ? In short: HDMI ARC is the better choice if you are looking forhigh sound quality and convenience. Optical cable is suitable for older devices or simpler needs.
The most important differences:
- Sound quality : HDMI ARC supports the latest formats such as Dolby Atmos , while optical cable only supports up to 5.1 channel audio.
- Functionality : HDMI ARC allows you to control multiple devices with one remote, optical cable does not.
- Compatibility : Optical cable works with older devices, while HDMI ARC requires newer models.
Recommendation:
- Use HDMI ARC if your TV and soundbar support this feature.
- Choose an optical cable if your equipment does not support HDMI ARC or if you are using an older audio system.
Further in the article you will find clear steps on how to connect both cables, their advantages and disadvantages, and tips on how to choose the right solution.
HDMI ARC connection guide
What are HDMI ARC and eARC?
HDMI ARC (Audio Return Channel) makes it easier to connect your TV to external audio devices using just one HDMI cable that carries both video and audio signals. [3] This means you can eliminate the need for additional audio cables – your TV sends the audio signal directly to your soundbar or home theater system.
eARC (Enhanced Audio Return Channel) is an improved version of ARC with higher bandwidth. It supports higher quality audio formats such as uncompressed 7.1-channel audio , Dolby Atmos, DTS:X , Dolby TrueHD, and DTS-HD Master Audio [4] [5] . Whereas standard ARC supports up to 5.1-channel Dolby Digital and DTS Digital Surround audio [2] [3] .
To use HDMI ARC or eARC, make sure both your TV and soundbar have compatible ports [2] [3] [4] [5] . Below are the steps to properly connect this technology.
How to connect using HDMI ARC
Before you begin, turn off your TV and soundbar, unplug their power cords and HDMI cable. After waiting a few minutes, connect the cable to the designated ARC/eARC ports, and turn the devices back on [4] .
Find the ARC/eARC ports . They are usually labeled with “ARC” or “eARC.” For example, on Samsung TVs, the ARC port is usually labeled “HDMI IN (ARC),” and on soundbars, it is usually labeled “HDMI OUT (TV-ARC).” [2] On Sony BRAVIA TVs, only some HDMI ports support ARC/eARC, so check the labels. [5]
The choice of cable depends on the technology used. For ARC, an HDMI 1.4 or higher cable is sufficient [2] , while eARC requires a High-Speed HDMI Cable with Ethernet or an Ultra High-Speed HDMI Cable , which supports up to 48 Gbps transmission [4] [5] . Sony recommends a Premium High-Speed (18 Gbps) or Ultra High-Speed HDMI Cable (48 Gbps) for eARC [5] .
Connect one end of the cable to the HDMI ARC/eARC port on your TV and the other end to the HDMI ARC/eARC port on your soundbar [2] [3] [4] [5] . Finally, enable HDMI-CEC in your TV settings so you can control your soundbar with your TV remote.
Benefits of HDMI ARC
HDMI ARC technology offers several benefits that enhance your home entertainment experience.
- A single cable helps reduce cable clutter, making your system look tidier.
- Support for high-quality audio formats. eARC supports Dolby Atmos and DTS:X, which provide a three-dimensional sound experience - especially useful when watching movies or playing games [4] [5] .
- HDMI-CEC allows you to control multiple devices with a single remote. For example, when you turn on the TV, the soundbar automatically turns on.
- Digital audio transmission ensures high sound quality without the signal loss that can occur with analog connections.
Troubleshooting HDMI ARC
Sometimes HDMI ARC may not work as expected. Symptoms of problems may include no sound, intermittent sound, or video and audio out of sync [6] [7] .
First, reboot your devices and check your cable. Turn off your TV and soundbar, unplug the power and HDMI cable, wait 5 minutes, then reconnect everything (TV first, then soundbar) [6] [7] [8] . Make sure you're using the correct HDMI ARC/eARC port, and try a different certified HDMI cable if necessary [6] [7] [8] [9] .
Turn on the CEC feature. It must be enabled on both the TV and the soundbar. Note that this feature may be called differently on different devices: Anynet+ (Samsung), Simplink (LG), Control for HDMI/BRAVIA Sync (Sony), EasyLink (Philips), or Aquos Link (Sharp).
If problems persist, disconnect third-party devices such as cable boxes or game consoles, as they may interfere with ARC functionality [7] [8] .
Optical cable connection guide
What is an optical ( TOSLINK ) connection?
An optical cable transmits a digital audio signal using pulses of light. [10] [12] TOSLINK (Toshiba Link) is the standard name for an optical audio cable, often used in televisions, soundbars, and home theater systems. This cable supports 5.1-channel Dolby Digital and DTS audio formats, making it ideal for most home entertainment systems. However, it does not support more advanced formats such as Dolby Atmos or DTS:X. [10] [12] The following are steps to properly connect an optical cable to your devices.
How to connect using an optical cable
Before starting, remove the protective caps from the cable ends [10] .
- Find the ports : On your TV, look for a port labeled "OPTICAL DIGITAL OUT" or "DIGITAL AUDIO OUT." On your soundbar, look for an "OPTICAL DIGITAL IN" or "DIGITAL AUDIO IN" port [10] [11] [12] [14] .
- Connect the cable : Insert the cable into the port until it is firmly seated [10] [11] [13] [14] .
- Set the audio output : Turn on your TV and select "Audio Output" in the audio settings menu. Set "Optical", "Optical Out" or "Optical Out Device" as the audio output source. Some TV models may require you to disable the built-in speakers [10] [12] [14] .
- Set up your soundbar : Turn on your soundbar and select "Optical" or "Digital In" as the input source. Some soundbars automatically detect the connected input [10] [14] .
Advantages and disadvantages of optical communication
An optical cable ensures high-quality digital audio transmission because light pulses are not susceptible to electromagnetic interference. This connection is also backward compatible with older devices that may not have HDMI ARC.
However, optical cable has its limitations. It only supports 5.1-channel Dolby Digital and DTS formats and does not support advanced audio technologies such as Dolby Atmos or DTS:X. It is also worth noting that optical cable only transmits audio, so you will need a separate cable for video, such as HDMI.
If you don't hear sound after connecting, check that the cable is properly connected to both devices and that the settings are correct [11] [14] .
Optical cable is a reliable choice for audio transmission, but its capabilities are limited compared to HDMI ARC, which offers wider support for audio formats.
HDMI ARC vs Optical: Which One to Choose?
Comparison criteria
As we've discussed, both HDMI ARC and optical have their own advantages. This time, we'll compare them head-to-head, looking at sound quality, supported formats, ease of use, and device compatibility.
Audio quality is a key consideration. HDMI ARC allows for higher-bandwidth audio and uncompressed formats, while optical is limited to compressed audio. [1] [15] The formats supported also differ - HDMI ARC supports advanced surround sound formats such as Dolby Atmos or DTS:X, while optical does not.
In terms of usability and compatibility , HDMI ARC offers more features, including remote control integration via HDMI-CEC, but requires newer devices. Optical cable, while compatible with older devices, has limited functionality [1] [15] .
The following is a table summarizing the main differences:
HDMI ARC vs Optical Comparison Chart
| Feature | HDMI ARC/eARC | Optical (TOSLINK) |
|---|---|---|
| Sound quality | Up to 7.1, Dolby Atmos, DTS:X | Up to 5.1, without Atmos/DTS:X |
| Remote control | Yes (via HDMI-CEC) | Mostly not |
| Cable quantity | 1 (audio and video) | For audio only |
| Compatibility | Newer devices | Older and new devices |
| Functionality | More features (CEC, ARC) | Only sound |
| Interference immunity | High | Very high |
| Supported formats | Dolby Atmos, DTS:X, PCM | Dolby Digital, DTS, PCM |
As you can see from the table, HDMI ARC offers more options, especially when it comes to sound quality and additional features. However, optical cable remains a viable option for certain situations.
Decision making
The choice depends on your equipment and needs. If your TV and sound system support HDMI ARC, it is worth choosing this option for better sound quality and more convenient control [1] [16] . Most modern TVs manufactured after 2017 already have at least one HDMI ARC connector [1] .
Meanwhile, an optical cable is a good solution for older TVs or sound systems that don't support HDMI ARC. While it only offers up to 5.1 channels of digital audio, it still provides reliable audio transmission [1] [16] .
If you’re planning to upgrade, you might want to consider HDMI eARC , an advanced version of HDMI ARC that supports even higher bandwidth and the latest audio formats. This technology is becoming increasingly popular in new TVs and audio systems, making it a great solution for future home theater systems [16] .
Before making a final decision, make sure that both devices support the chosen connection type, and don't forget to enable the necessary features in the TV settings, such as HDMI-CEC or ARC/eARC mode [16] [17] .
AUTOGARSAS.LT expert solutions
Choosing a soundbar and cables
AUTOGARSAS.LT is one of the leading suppliers of audio and video solutions in Lithuania, offering a carefully selected range of soundbars from well-known brands such as Samsung, Sony, JBL , Bose and Yamaha . The specialists working here help customers choose the most suitable equipment, taking into account the TV model, room size and individual needs.
For example, if your living room is 20-30 m² and you have a 4K TV, AUTOGARSAS.LT experts can recommend the Samsung HW-Q700C soundbar along with a 2-meter HDMI 2.1 cable. This combination supports Dolby Atmos and HDMI ARC/eARC functions and ensures surround sound quality , which perfectly meets the needs of most Lithuanian homes. In addition, it is a great choice for those looking for the best price-quality ratio.
When it comes to cables, AUTOGARSAS.LT offers a wide selection of certified HDMI and optical (TOSLINK) cables. HDMI cables range in price from €15 to €60, and optical cables range from €10 to €30. All cables are selected to ensure reliable signal transmission and compatibility with modern soundbars and TVs.
Soundbar prices here start at around €120 for simpler models and can reach over €1,000 for high-end home cinema solutions. Such a variety allows every customer to find the right product according to their budget and technical requirements.
However, choosing the right equipment is not enough - it is also important to ensure professional installation and proper configuration.
Professional installation services
AUTOGARSAS.LT provides installation services that include everything from equipment connection to system calibration. The process begins with a visit planning , during which specialists assess the layout of the room and select the optimal location for the soundbar.
During installation, our technicians not only connect all the components, but also configure features such as HDMI-CEC (a unified remote control feature), synchronize audio and video settings, and integrate the system with your smart home. This means you can conveniently control the entire system and enjoy seamless entertainment content.
The work of AUTOGARSAS.LT specialists covers both urban and rural homes. For example, a recent project implemented in Vilnius was the integration of a Sony soundbar with a multi-room audio system in a modern loft-type apartment. The result is not only great sound, but also an aesthetic solution.
Customers who use the services of this company receive a 24-month warranty , technical support in Lithuanian, and prompt service in case of malfunctions. In addition, specialists advise on software updates and system maintenance to ensure that the equipment operates smoothly for many years.
AUTOGARSAS.LT services have received high ratings - according to Google Reviews, customers rate the company 4.8/5 . Fast delivery, clear consultations, and high-quality installation, even in the most complex projects, are especially praised.
These solutions allow you to create an exceptional home theater experience, ensuring seamless equipment connection and control.
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HDMI ARC or Optical? Which is the Best Way to Connect Your TV and Audio Gear?
Conclusions
Choosing the right connection method not only allows you to enjoy better sound quality but also more convenient everyday use. HDMI ARC ensures high-quality sound and allows convenient system control, while optical cable is a practical solution for older systems or in situations where HDMI ARC is not supported.
In short, HDMI ARC is the better choice for its sound quality and functionality, but optical cable is still a reliable option for older equipment.
To achieve the best results, it is important to configure the equipment correctly. Improper connections or settings can reduce the system's efficiency and sound quality.
Market trends indicate that HDMI ARC is increasingly used in the latest TVs, but optical cables still remain important for older audio systems [1] [18] .
If you have any questions about equipment or installation, AUTOGARSAS.LT specialists can help ensure that your sound system is working flawlessly. Properly implemented solutions will help you get the most out of your investment in sound quality.
FAQs
When should I choose an optical cable over an HDMI ARC connection?
Why choose optical cable?
Optical cable is the ideal solution when it comes to providing stable, high-quality audio transmission. This is especially important if you are using longer cables or if your environment is prone to electromagnetic interference that can affect the performance of other types of cables. Optical cables transmit audio signals in a one-way fashion, making them ideal for situations where you only need audio output, without the additional features such as bi-directional communication or video transmission offered by HDMI ARC.
If your goal is a simple but reliable audio solution, an optical cable may be exactly what you are looking for. AUTOGARSAS.LT offers a wide range of optical cables that ensure high sound quality for your home theater or audio system.
How to properly set up and use the HDMI ARC function?
To ensure that the HDMI ARC function works smoothly, there are a few important things to note. First, use an HDMI cable that supports the ARC function and connect it to the HDMI ARC jack on both the TV and the soundbar. It is also necessary to check that both devices support HDMI ARC technology.
Activate the HDMI ARC function in your TV settings and select the appropriate audio output option. To avoid possible interference, disable other audio output options. Don't forget to update the software on both devices to ensure smooth operation and best compatibility.
If you need help choosing the right cable or equipment, visit AUTOGARSAS.LT . Here you will find a wide selection of quality audio solutions and you can consult with professionals.
Is it possible to transmit both video and audio using the same HDMI cable using HDMI ARC?
Can HDMI ARC technology transmit both video and audio?
Yes, HDMI ARC technology allows you to transmit both video and audio over a single HDMI cable. To ensure a stable signal and high quality audio and video, it is important to use a quality cable , such as a High-Speed or Ultra High Speed HDMI cable.
This technology is especially convenient when you want to connect a soundbar to a TV, as it reduces the need for additional cables. If you are not sure which cable or soundbar to choose, visit AUTOGARSAS.LT - our specialists will help you choose the most suitable solution for your home.
