Any TV today, even mid-range and low-end ones, come with several HDMI ports, but not all offer the same functions. Some carry labels like ARC or even eARC, and that’s when all the doubts begin to arise.
The back of a TV usually looks like a technical panel with multiple inputs, with USB, digital optical, Ethernet, auxiliary outputs and, of course, several HDMIs. This last one is the most used to connect external devices such as consoles, players, computers or sound bars.
But although all HDMI ports look the same at first glance and even in name, there are key differences that mark how they work and what they are for.
Some versions only allow you to send images, others also receive sound, and some more advanced ones manage high fidelity audio signals. If you don’t know which one you’re using, you may be wasting part of your television’s potential or sound system.
What is an HDMI port for and why are there so many
HDMI has become the standard connector for almost everything related to video and sound. Replaced old scarts, RCA or VGA connectors, and allows you to transmit digital image and audio cleanly and in high quality.
With a single cable you can send 4K content, activate HDR functions, manage surround sound or take advantage of high refresh rates for video games. That’s why you find it on televisions, projectors, laptops, consoles or AV receivers. Although all HDMI ports use the same port, Its capabilities may vary depending on the version.
Some are designed only for signal input, others can also return audio, and there are even models prepared to handle uncompressed data through HDMI 2.1. That’s why not all HDMI connections are the samealthough on the outside they seem that way.
Standard HDMI: the connector of a lifetime
Traditional HDMI is the one commonly used for send signal from a source device towards the television. For example, you connect a console or a Blu-ray player, and both the video and sound travel to the TV through that cable.
The connection is simple and works without complications, but it has an important limitation: the audio only goes in one direction. If you want the sound to come from the TV to other equipment, such as a sound bar, you need another cable, usually digital optical.
This type of HDMI is present in practically any multimedia device, so it works perfectly for watching content, but if you have a more complex sound setup or are looking to reduce cablesfalls short.
It should be noted that it does not manage signal returns or integrate more advanced functions, so not compatible with high-end sound systemsnor does it have advanced features such as controlling the volume of the audio equipment from the TV remote.
HDMI ARC: a key feature if you use a sound bar
This is where HDMI ARC comes into play, which stands for Audio Return Channel, and its function is allow the TV sound to travel in the opposite direction through the same HDMI cable, from the TV to an external sound system.
In this way, you can watch content from streaming platforms such as Netflix, HBO or YouTube directly on the Smart TV and send audio to sound bar without the need for additional cables.
With ARC, the HDMI port becomes a bi-directional channelbut only for audio. The picture continues to flow from the source to the TV as always, but now the sound can return along the same path.
This feature is especially useful if you have multiple devices connected to the TV and want centralize audio in a single system. You avoid messy cables, save space and facilitate control with a single remote control. If you use a sound bar, the most logical thing is to take advantage of the connection to take advantage of it.
It allows you to control the volume from the TV, reduces latency and eliminates the need to configure optical or auxiliary outputs. Yes indeed, will only work if they support ARC.
How to tell if your TV has ARC (and why it matters)
Identifying if your television has this function is simple, you just have to look next to the HDMI ports, if one of them has the word ARC, you already have it. You should also make sure that the sound equipment, whether a bar or receiver, has an HDMI input with ARC support. Both ends must be compatible for it to work.
Not all televisions include it, especially low-end models. It is for this reason that knowing it can make the difference between integrated sound system or rely on external and more cumbersome solutions.
While ARC is useful, its natural evolution is called eARC, the enhanced version that is part of the HDMI 2.1 standard. The main difference is in the ability to send uncompressed audiowhich means you can enjoy formats like Dolby TrueHD or DTS-HD Master Audio with maximum quality, something impossible with traditional ARC.
Without a doubt, it is the ideal option if you have a powerful sound system or a high-end bar, like Sonos, that supports cinema formats. Of course, both your TV and sound system must support eARC for this to work.