HDMI ARC vs Optical: Which To Use For Better Audio [2023] (2024)

If you yearn for an impressive listening experience out of your home theater audio, HDMI ARC vs Optical can be an amazing pair of lifesavers.

However, picking the better of the two can be a hard nut to crack. This is why our team of experts has created this article to help you decide.

HDMI ARC (High-Definition Multimedia Interface Audio Return Channel) and optical both transmit multi-channel audio from one system to another. Both HDMI ARC and optical cables also have support for a wide range of audio formats.

Optical cables are limited to 5.1 surround sound, meaning they only support Stereo, Dolby Digital, and DTS.

On the other hand, HDMI ARC supports playback for more recent devices that use audio formats, such as Stereo, DTS HD Master Audio, Dolby Atmos, DTS:X soundtracks, and Dolby TrueHD. Although HDMI ARC doesn’t support 7.1 surround speakers (which the HDMI eARC does), it supports more sound formats than optical cables. That said, if you really want more speed and bandwidth, the eARC is something you should also try. There are a few differences when you compare HDMI ARC and eARC, including audio quality and gaming features. In the end, it’s all about what you need.

For instance, HDMI 2.1 cables offer 120 FPS in 4K videos, whereas HDMI 2.0 cables are limited to 60 FPS in 4K. However, the most significant thing here is they’re both compatible with video, while optical is not.

Material construction is another significant difference between the HDMI ARC vs optical. HDMI cables are mainly made of copper, a standard material for constructing electronic wires[1]. Copper is cheap and has been in production for ages, which is why it’s commonly used.

Contrarily, optical cables are designed with fiber optic strands, which are glass type material. Unlike copper, they are somewhat expensive to produce.

Apart from material construction, the main difference between the two is the transmission. Copper is prone to electromagnetic interference, whereas optical cables aren’t because they transmit signals via light rather than electrical currents.

In terms of minimal interference and sound clarity, the cable length is a factor, although it doesn’t matter to most people since their TVs and A/V receivers or soundbars are close to each other.

Optical cables retain sound quality at a maximum of 30 meters. This is good if you want an extensive connection around your house.

On the other hand, HDMI ARC cables don’t retain sound quality beyond 15 meters. The reason for this is HDMI cables use low voltage, which doesn’t allow it to carry signals that extensive.

The device(s) you want to connect to plays a major role regarding when to use HDMI ARC cables. If your device supports high-resolution audio like DTS HD Master Audio, Dolby Atmos, DTS:X soundtracks, and Dolby TrueHD, you should use an HDMI ARC cable.

If you want to upgrade to a high-end audio system, need to watch Blu-rays, or to plan to set up a home theater system, you should use HDMI ARC cables since they support both video and audio with one cable.

(Having trouble with your HDMI cable? Read our guide on how to fix damaged or bad HDMI cable here)

Finding the right cable for your home theater setup? This list might be helpful to you:

• VGA versus HDMI
• VGA versus DVI
• HDMI ARC versus HDMI