Como conectar uma TV a um receptor doméstico sem HDMI – guia e diagramas

Deseja um excelente som de TV ou caixa de cabo do seu sistema de áudio, mas seu receptor não possui uma porta HDMI? Ótimas notícias – existem outras maneiras de fazer isso.

Neste artigo você encontrará uma tonelada de ótimas informações:

Como conectar uma TV a um receptor sem HDMI
Diagramas claros e úteis para mostrar como
O que funciona e o que não funciona com som surround
Informações para ajudar você a obter os melhores resultados
..e muito mais!

Opções de conexão e cabo para saber primeiro

Os cabos necessários dependerão das entradas disponíveis do seu receptor e do conversor (se houver) que você precisa usar. Não há um conjunto padrão de conectores de saída de áudio para TVs, portanto, pode ser apenas um ou uma combinação de vários.

É importante ter pelo menos um tipo de entrada não HDMI em seu receptor, como uma entrada digital coaxial, entrada digital óptica ou entradas auxiliares (“AUX”). (Vou cobrir isso com mais detalhes à medida que avançamos)

Além do HDMI, sua TV pode ter:

Tomadas RCA: também chamado de analógico saídas de sinal porque o áudio não é digital e pode ser amplificado diretamente por um receptor. Usar um cabo de áudio RCA é barato e fácil. Algumas TVs têm um conector estilo jack de fone de ouvido de 3,5 mm (1/8 pol.). Você pode usar um cabo adaptador de 3,5 mm para RCA para isso.
Saída digital óptica: Também chamado de conector TOSLINK, é uma saída de áudio digital que deve ser convertida novamente em um sinal analógico em algum momento. Você pode conectar um cabo óptico para conectar a receptores com esse tipo de entrada. Os sinais são transmitidos usando pulsos de luz em vez de bits elétricos.
Saída digital coaxial: este usa um conector estilo RCA que se conecta a um cabo RCA para transportar o sinal de áudio digital usando bits elétricos. Observe que você não pode conecte-o às entradas RCA AUX analógicas de um receptor.

Os conectores listados acima se aplicam tanto a uma TV padrão quanto a uma smart TV - sempre depende do modelo específico.

HDMI e HDMI ARC explicados

O padrão High Definition Multimedia Interface (HDMI) está no mercado de eletrônicos de consumo há cerca de 15 anos. Ele evoluiu um pouco, tornando-se mais flexível e sim – infelizmente – um pouco complicado de entender às vezes.

Segue uma explicação simples:

O padrão HDMI original (mais antigo) transportava vídeo, mas não áudio para dispositivos externos . Isso significa que, se sua TV ou decodificador não tiver uma porta HDMI ARC (apenas uma HDMI original), você precisará conectar o som usando uma das outras saídas fornecidas.
O padrão ARC (Audio Return Channel) foi criado para permitir que você transporte som e vídeo em um único cabo. Introduzido na versão HDMI 1.4, já existe há algum tempo. O HDMI ARC pode transportar até som surround 5.1.
HDMI eARC is essentially an upgrade of the ARC standard and can carry up to 7.1 surround sound or high-quality digital audio for music, along with a few other minor advantages.

The good news is that since HDMI ARC has been around since 2009 it’s most likely what kind of output your TV or other devices have. It also means you’ll have a great option for a receiver/home theater system without an HDMI input jack as you’ll see.

As you see later, an HDMI audio extractor (adapter) will make getting sound possible – and it’s affordable, too.

Digital vs analog audio jacks explained

Digital outputs work by transmitting audio represented in digital format made up of bits of information. Newer AV receivers with these types of inputs can decode the digital signal back to sound and amplify it to drive speakers.

An older receiver or a standard home stereo amplifier cannot and you’ll likely need a digital to analog (RCA) converter box to do the job, as they provide an RCA compatible output pair.

Analog jacks are a non-digital output that can be amplified to drive speakers by any compatible receiver or amp with auxiliary, DVD, or CD inputs. You can also use self-powered speakers with analog outputs.

How to connect a TV to a receiver without HDMI

The type of connection you’ll need will depend on your particular TV. Older receivers often have auxiliary (AUX) RCA input jacks with one or more labels:

AUX in
DVD in
CD in

Input jacks like these were used years ago playing audio from a separate audio source through the receiver and will work fine for TV sound with the right connection. (You can also connect sound from an external media player or Blu Ray player for example if you like.)

They’re the same thing as both accept a low-level signal (line level) signal to be amplified by the receiver in the right mode and sent to the speakers.

DIAGRAM – TV to receiver connection options

As I mentioned earlier, there are two main types of TV sound connections you’ll use:

Analog (non-digital) via RCA jack outputs or a 3.5mm (1/8″) headphone style output jack
Digital signal outputs:an optical output or coaxial (RCA style) output

1. Using an HDMI converter (HDMI to RCA adapter, HDMI to digital adapter)

An HDMI audio extractor is a device that removes the digital sound source from an HDMI output or other device and provides digital or analog outputs. Plug in the HDMI connection then you can connect to nearly any non-HDMI receiver or amplifier with compatible inputs via an optical audio cable or RCA connectors.

A good audio extractor is about only $25-$50 and can even support 5.1 support sound for home theater systems that can have the feature. Note that the HDMI cable is often separate, but those cost just a few dollars.
NOTE: Although connecting an RCA cable is easy, for best results (or to take advantage of surround sound) you’ll want to use the optical or coaxial digital jack connection.

2. Connecting to a TV’s digital output jacks

If your TV, cable box, or other sound source doesn’t have ARC a second option is to connect to the digital outputs, if provided. There are two reasons to use a digital connection if your receiver supports it instead of analog:

Better audio quality
If your TV or other media device supports surround sound, this will allow you to use it (unlike a 2-channel audio connection)

Either an optical or coaxial digital connection will be fine, although a TOSLINK optical cable will avoid electrical interference or ground loops since it will isolate the electrical ground connections. A digital optical cable costs just a few dollars online so it’s affordable, too!

One thing to know is that fiber optic cables can be damaged if bent too much so you’ll need to be careful to avoid kinking them or crushing them in tight spaces. Doing so can damage the internal material, causing them to fail to carry the signal properly.

3. Connecting a TV to a receiver using analog jacks

A third option, this is normally very easy although you may need to turn on audio outputs in the menu on some TVs to get sound.

Simply connect whichever available outputs you have to the auxiliary, DVD, CD etc. inputs on your receiver. This is a great budget option because you can use a cheap RCA cable as it will work fine for good sound.

Tip:some TVs have a headphone size jack in which case you can use a 1/8″ (3.5mm) plug to RCA jack adapter. You can then connect any RCA cable pair between the TV and the AV receiver.

Notes on TVs with digital out jacks (how to get RCA jacks from them)

Digital to analog converters accept a digital signal that can’t be used with powered speakers or an amplifier and convert the digital signal to a stereo output. RCA and/or 3.5mm (1/8″ headphone) jacks are provided.

This is a bit trickier because you’ll have to convert the digital audio signal, not just connect it. You’ll need to pick up a digital to RCA converter. These cost about $18-$25 and usually include a small AC-DC power supply.

Some do or do not include the cables needed to connect to your television (many do include it) so you’ll simply use whichever option you have:the optical (TOSLINK, fiber optic) jack or the coaxial digital jack.
Note: When using your AV receiver to play the TV sound through your receiver’s speakers, be sure to disable or turn off the volume to the internal TV speakers if it has the option. Otherwise, the TV speakers will conflict with your better speakers, resulting in poor &distracting sound. Use only the stereo speakers when possible.

Can I listen to my TV in surround sound on a receiver without HDMI?

The short answer is maybe – it depends on two things:

Your TV must provide a passthrough type (5.1 capable) digital output. Not all TVs do this, sadly.
The receiver must have a digital input and surround sound 5.1 support.

Unfortunately many televisions usually “downmix” (convert) the 5.1 audio stream to a 2 channel output. In some cases there’s an option in the TV settings to enable a full 5.1 passthrough connection, sometimes called “LPCM.”

However, there’s no guarantee and frustratingly, TV manufacturers don’t always do a good job of making this clear. Generally you can be pretty confident about surround support over HDMI these days but it’s a bit of a gray area.

In some cases you might want to pick up a streaming media device such as an Amazon Firestick or others which do include surround sound output. Any receiver with Dolby Digital or DTS and a digital input can work with those.

Dolby Pro Logic I/II option

One worst-case scenario can help sometimes. If your TV doesn’t offer 5.1 support, you can use the Dolby Pro Logic feature that nearly all receivers with Dolby Digital decoding provide as a backwards compatible feature.

Dolby Pro Logic I/II was one of the first surround formats and only requires a 2-channel signal source. It can also simulate surround sound from any 2-channel movie or music, meaning you can take advantage of your surround sound system speakers. It’s an option worth trying out.