HDMI ARC vs Optical for Soundbars: Which Is Better?
If your TV and soundbar both support HDMI ARC, use HDMI ARC first. If your TV does not have HDMI ARC, an optical cable is the best backup connection for most soundbars. For a full setup guide, read our article on how to connect a soundbar to a TV without HDMI ARC.
This guide compares HDMI ARC and optical for soundbars, including sound quality, Dolby Atmos support, remote control, compatibility, setup difficulty, and buyer recommendations.
1. HDMI ARC vs Optical: Quick Comparison
| Feature | HDMI ARC | Optical |
|---|---|---|
| Best for | Modern TVs and soundbars | Older TVs and simple setups |
| Cable type | HDMI cable | Optical/TOSLINK cable |
| Audio direction | Can send audio from TV to soundbar through HDMI ARC | Sends audio from TV to soundbar only |
| Remote control support | Often supports TV remote volume control through HDMI CEC | Usually requires soundbar remote |
| Dolby Atmos support | Possible on some ARC setups, better with eARC | Usually not supported |
| Setup simplicity | Simple if both devices support ARC | Very simple and reliable |
| Best buying choice | Choose for newer TVs and better convenience | Choose for compatibility and stable basic audio |
For most modern home theater setups, HDMI ARC is the better choice. For older TVs or entry-level soundbars, optical remains a strong and practical connection method.
2. What Is HDMI ARC?
HDMI ARC stands for Audio Return Channel. It allows a TV to send audio back to a soundbar or audio system through an HDMI cable. This means one HDMI cable can connect the TV and soundbar for TV audio output.
A soundbar with HDMI ARC is convenient because it can reduce cable clutter and may allow the TV remote to control soundbar volume. This is one reason HDMI ARC is common in modern TV soundbar setups.
Advantages of HDMI ARC
- Uses one HDMI cable between the TV and soundbar.
- Can support TV remote volume control through HDMI CEC.
- Works well with smart TV apps, streaming devices, and modern soundbars.
- May support more advanced audio features than optical, depending on the TV and soundbar.
Limitations of HDMI ARC
- Both the TV and soundbar must support HDMI ARC.
- The HDMI port must be labeled ARC or eARC.
- CEC settings can sometimes be inconsistent across TV brands.
- Some advanced audio formats require HDMI eARC instead of regular ARC.
3. What Is Optical Audio?
Optical audio, also called TOSLINK or digital optical audio, sends digital sound from the TV to the soundbar through an optical cable. It is one of the most common ways to connect a TV to a soundbar without HDMI ARC.
Many soundbars with optical input are compatible with older TVs, projectors, set-top boxes, and basic home entertainment systems.
Advantages of optical audio
- Very stable for basic TV audio.
- Easy to set up.
- Widely available on older TVs.
- Good for stereo, PCM, and some compressed surround formats.
Limitations of optical audio
- Usually does not support Dolby Atmos.
- Does not carry video.
- Usually cannot control soundbar volume through the TV remote.
- Supports fewer advanced audio features than HDMI eARC.
4. HDMI ARC vs Optical: Which Has Better Sound Quality?
For basic TV sound, HDMI ARC and optical can both deliver good audio quality. If you are watching regular TV shows, YouTube, streaming video, or news, the difference may not be obvious.
The real difference appears when you need advanced audio formats, simplified control, or higher bandwidth. HDMI ARC is generally more flexible, while HDMI eARC is the better choice for high-bandwidth formats. Optical is still reliable for standard audio, but it is more limited.
| Audio Need | Best Connection | Reason |
|---|---|---|
| Regular TV audio | Optical or HDMI ARC | Both can work well |
| Dialogue clarity | Optical or HDMI ARC | Soundbar tuning matters more than cable type |
| Simple 2.0 or 2.1 soundbar | Optical or HDMI ARC | Both are suitable |
| Dolby Atmos soundbar | HDMI ARC or HDMI eARC | Optical is usually not enough |
| Premium home theater setup | HDMI eARC | Best support for advanced audio formats |
5. Can HDMI ARC or Optical Support Dolby Atmos?
Optical usually does not support Dolby Atmos. If you want a Dolby Atmos soundbar experience, HDMI ARC or HDMI eARC is normally required. HDMI eARC is the better option for higher-bandwidth audio formats.
Some streaming services may deliver Dolby Atmos through compressed formats over HDMI ARC, but compatibility depends on the TV, soundbar, app, and audio settings. For a deeper comparison, read our Dolby Atmos soundbar guide.
6. Remote Control and Daily Use
HDMI ARC is usually more convenient for daily use because it can work with HDMI CEC. When HDMI CEC works correctly, the TV remote may control the soundbar volume, power, and mute functions.
Optical does not normally offer the same level of control. If you connect a soundbar using optical, you may need to use the soundbar remote to adjust volume. Some soundbars support remote learning, but this depends on the model.
| Daily Use Feature | HDMI ARC | Optical |
|---|---|---|
| Use TV remote for volume | Often possible | Usually not |
| Power on/off with TV | Often possible | Usually not |
| Simple plug-and-play audio | Yes | Yes |
| Least compatibility issues | Depends on ARC/CEC behavior | Very stable for basic audio |
7. Compatibility with Older TVs
If your TV is older and does not have an HDMI ARC port, optical is usually the best choice. Many older TVs include optical audio output, and many soundbars still include optical input for this reason.
If your TV has neither HDMI ARC nor optical output, check for AUX, RCA, or Bluetooth. You can also read our guide on connecting a soundbar without HDMI ARC.
8. Which One Should You Choose?
Choose HDMI ARC if you have a newer TV and want a cleaner setup, easier remote control, and better support for modern soundbar features. Choose optical if your TV is older, your setup is simple, or you want a stable digital audio connection without relying on HDMI CEC.
| Your Situation | Recommended Choice |
|---|---|
| Your TV and soundbar both have HDMI ARC | Use HDMI ARC |
| Your TV has no HDMI ARC but has optical output | Use optical |
| You want Dolby Atmos | Use HDMI ARC or HDMI eARC |
| You want the simplest reliable connection for an older TV | Use optical |
| You want one remote for TV and soundbar | Use HDMI ARC if CEC works well |
If you are choosing a soundbar by TV size, see our guide on how to choose a soundbar for your TV size.
9. What This Means for Soundbar Buyers
For consumers, HDMI ARC is usually the best first choice, while optical is the best backup. For brands, importers, and retailers, the best soundbar design often includes both HDMI ARC and optical input because customers use different TVs in different markets.
A soundbar with both HDMI ARC and optical input can serve more users, reduce setup complaints, and improve compatibility across new and older TVs.
| Product Feature | Buyer Benefit | Market Value |
|---|---|---|
| HDMI ARC | Modern TV compatibility and easier control | Important for mid-range and premium soundbars |
| Optical input | Works with older TVs | Important for mass-market compatibility |
| Bluetooth | Wireless music and TV audio | Useful for entry-level and lifestyle products |
| AUX input | Backup for legacy devices | Useful for budget models |
| HDMI eARC | Better support for advanced audio formats | Useful for premium Dolby Atmos soundbars |
For setup performance, soundbar placement also matters. Read our soundbar placement guide to understand where a soundbar should be placed for better sound.
10. OEM/ODM Soundbar Manufacturing Considerations
For soundbar brands and private-label buyers, connection configuration should be planned before product development. A low-cost model may only need optical, Bluetooth, and AUX. A mid-range model should usually include HDMI ARC. A premium model may need HDMI eARC, Dolby Atmos support, and wireless subwoofer pairing.
Samesay supports OEM/ODM soundbar manufacturing for brands, retailers, importers, and audio product buyers. Connection options can be customized based on target market, price range, product positioning, and certification requirements.
| Soundbar Tier | Suggested Inputs | Recommended Positioning |
|---|---|---|
| Entry-level soundbar | Optical, Bluetooth, AUX | Affordable TV audio upgrade |
| Mid-range soundbar | HDMI ARC, optical, Bluetooth | Mainstream living room soundbar |
| Soundbar with subwoofer | HDMI ARC, optical, Bluetooth, wireless subwoofer | Movie and music home entertainment |
| Premium soundbar | HDMI eARC, optical, Bluetooth, Dolby Atmos support | High-performance TV and cinema audio |
Develop a Soundbar Product with the Right Connection Setup
Samesay can help brands and importers develop soundbars with HDMI ARC, optical input, Bluetooth, AUX, subwoofer options, and private-label customization.
Contact Samesay for OEM/ODM Soundbar Manufacturing11. FAQ
Is HDMI ARC better than optical for a soundbar?
Yes, HDMI ARC is usually better for modern soundbars because it can support easier TV control and more flexible audio setup. Optical is still a reliable option for older TVs and basic soundbar use.
Does optical sound worse than HDMI ARC?
For regular TV audio, optical and HDMI ARC can both sound good. The difference becomes more important when you need advanced audio formats, Dolby Atmos, or HDMI CEC control.
Can optical support Dolby Atmos?
Optical usually does not support Dolby Atmos. If Dolby Atmos is important, use HDMI ARC or HDMI eARC, depending on your TV and soundbar compatibility.
Can I use both HDMI ARC and optical at the same time?
Most users should choose one main audio output. Some TVs may allow multiple outputs, but using both can create audio delay or control issues.
Why is there no sound through HDMI ARC?
Check that both devices support HDMI ARC, use the HDMI port labeled ARC or eARC, enable HDMI CEC, and set the TV audio output to external speaker or HDMI ARC.
Why is there no sound through optical?
Set the TV audio output to optical or digital audio out. If there is still no sound, change the digital audio format to PCM in the TV settings.
Should a soundbar have both HDMI ARC and optical?
Yes. For broader market compatibility, a soundbar with both HDMI ARC and optical input is easier to use with both new and older TVs.
