If you have a smart TV and an old home theater system, you may want to learn about how to connect old home theater to smart tv to enjoy the best of both worlds. A smart TV can offer you access to various streaming services, apps, and online content, while a home theater system can provide you with immersive sound quality and surround effects.
However, connecting an old home theater to a smart TV may not be as straightforward as connecting a newer one, as they may have different types of inputs and outputs. In this article, we will explain the different ways you can connect an old home theater to a smart TV, and the advantages and disadvantages of each method.
Option 1: HDMI Cable

The easiest and most common way to connect an old home theater to a smart TV is by using an HDMI cable. HDMI stands for High-Definition Multimedia Interface, and it can transmit both high-definition video and audio signals through a single cable. HDMI cables are widely compatible with most modern devices, including smart TVs, home theater systems, Blu-ray players, game consoles, and more.
To connect an old home theater to a smart TV using an HDMI cable, you will need to have an HDMI port on both devices. If your home theater system does not have an HDMI port, you may need to use a different method. If your home theater system has an HDMI port, follow these steps:
- Turn off and unplug both your smart TV and home theater system.
- Take an HDMI cable and plug one end into the HDMI output of your home theater system. This may be labeled as HDMI OUT, HDMI ARC, or HDMI TV-ARC.
- Plug the other end of the HDMI cable into the HDMI input of your smart TV. This may be labeled as HDMI IN, HDMI ARC, or HDMI TV-ARC. If your smart TV has multiple HDMI inputs, choose the one that supports ARC (Audio Return Channel). ARC allows you to send audio signals from your smart TV to your home theater system without the need for a separate audio cable.
- Turn on your home theater system first, followed by your smart TV.
- On your smart TV, select the HDMI input that you connected to your home theater system. You may need to use the Input or Source button on your remote or TV to do this.
- On your home theater system, select the HDMI output that you connected to your smart TV. You may need to use the Output or Function button on your remote or system to do this.
- You should now be able to see and hear your home theater system’s content on your smart TV.
Advantages of HDMI Cable
- HDMI cable can transmit both high-definition video and audio signals, which means you can enjoy the best picture and sound quality possible.
- HDMI cable can support various audio formats, including Dolby Digital, Dolby TrueHD, DTS, DTS-HD, and more, which means you can enjoy the full surround sound effects of your home theater system.
- HDMI cable can support ARC, which means you can send audio signals from your smart TV to your home theater system without the need for a separate audio cable. This can simplify your setup and reduce cable clutter.
- HDMI cable is widely compatible with most modern devices, which means you can easily connect your smart TV and home theater system to other devices, such as Blu-ray players, game consoles, and more.
Disadvantages of HDMI Cable
- HDMI cable may not be compatible with some older home theater systems, which may not have an HDMI port. In this case, you may need to use a different method to connect your devices.
- HDMI cable may not support some older audio formats, such as Dolby Pro Logic, which may not be recognized by your smart TV or home theater system. In this case, you may need to adjust the audio settings on your devices or use a different method to connect them.
- HDMI cable may not work properly if the cable is too long, damaged, or of poor quality. In this case, you may need to replace the cable or use a different method to connect your devices.
Option 2: RCA Cable
Another way to connect an old home theater to a smart TV is by using an RCA cable. RCA stands for Radio Corporation of America, and it is a type of analog cable that can transmit video and audio signals through separate connectors. RCA cables are color-coded, with red and white connectors for audio and yellow for video. RCA cables are compatible with most older devices, including home theater systems, DVD players, VCRs, and more.
To connect an old home theater to a smart TV using an RCA cable, you will need to have an RCA port on both devices. If your smart TV does not have an RCA port, you may need to use a different method or an adapter. If your smart TV has an RCA port, follow these steps:
- Turn off and unplug both your smart TV and home theater system.
- Take an RCA cable and plug the red and white connectors into the corresponding audio outputs on your home theater system. These may be labeled as AUDIO OUT, AUDIO L/R, or AUX OUT.
- Plug the yellow connector into the video output on your home theater system. This may be labeled as VIDEO OUT, VIDEO, or COMPOSITE OUT.
- Plug the other end of the RCA cable into the corresponding inputs on your smart TV. These may be labeled as AUDIO IN, AUDIO L/R, or AUX IN for audio, and VIDEO IN, VIDEO, or COMPOSITE IN for video. If your smart TV has multiple RCA inputs, choose the one that matches the video format of your home theater system. For example, if your home theater system supports S-Video, choose the S-Video input on your smart TV.
- Turn on your home theater system first, followed by your smart TV.
- On your smart TV, select the RCA input that you connected to your home theater system. You may need to use the Input or Source button on your remote or TV to do this.
- On your home theater system, select the RCA output that you connected to your smart TV. You may need to use the Output or Function button on your remote or system to do this.
- You should now be able to see and hear your home theater system’s content on your smart TV.
Advantages of RCA Cable
- RCA cable is compatible with most older home theater systems, which may not have an HDMI port. This means you can still connect your old home theater system to your smart TV without the need for an adapter or a different method.
- RCA cable is easy to use, as it is color-coded and has separate connectors for video and audio. This means you can easily identify and match the connectors on your devices.
Disadvantages of RCA Cable
- RCA cable is an analog cable, which means it can transmit lower-quality video and audio signals than a digital cable. This means you may not be able to enjoy the high-definition picture and sound quality of your smart TV and home theater system.
- RCA cable can only support stereo audio, which means it cannot support surround sound effects or various audio formats. This means you may not be able to enjoy the full potential of your home theater system.
- RCA cable can be affected by interference, noise, or distortion, which can degrade the video and audio quality. This means you may need to use a high-quality cable or a different method to connect your devices.
Option 3: Component Cable

Another way to connect an old home theater to a smart TV is by using a component cable. Component cable is a type of analog cable that can transmit high-definition video signals through three separate connectors. Component cable is color-coded, with red, green, and blue connectors for video. Component cable can also transmit audio signals, but it requires a separate audio cable, such as an RCA cable. Component cable is compatible with some older devices, such as home theater systems, DVD players, game consoles, and more.
To connect an old home theater to a smart TV using a component cable, you will need to have a component port on both devices. If your smart TV does not have a component port, you may need to use a different method or an adapter. If your smart TV has a component port, follow these steps:
- Turn off and unplug both your smart TV and home theater system.
- Take a component cable and plug the red, green, and blue connectors into the corresponding video outputs on your home theater system. These may be labeled as COMPONENT OUT, YPbPr OUT, or RGB OUT.
- Plug the other end of the component cable into the corresponding inputs on your smart TV. These may be labeled as COMPONENT IN, YPbPr IN, or RGB IN. If your smart TV has multiple component inputs, choose the one that matches the video format of your home theater system. For example, if your home theater system supports 1080p, choose the 1080p input on your smart TV.
- Take an audio cable, such as an RCA cable, and plug the red and white connectors into the corresponding audio outputs on your home theater system. These may be labeled as AUDIO OUT, AUDIO L/R, or AUX OUT.
- Plug the other end of the audio cable into the corresponding inputs on your smart TV. These may be labeled as AUDIO IN, AUDIO L/R, or AUX IN. If your smart TV has multiple audio inputs, choose the one that matches the component input that you used for video.
- Turn on your home theater system first, followed by your smart TV.
- On your smart TV, select the component input that you connected to your home theater system. You may need to use the Input or Source button on your remote or TV to do this.
- On your home theater system, select the component output that you connected to your smart TV. You may need to use the Output
FAQs – How to Connect Old Home Theater to Smart TV
Q: How do I connect my old 5.1 speakers to my TV?
A: To connect your old 5.1 speakers to your TV, you will need to have a device that can convert the analog audio signal from your speakers to a digital audio signal that your TV can understand. One such device is an optical audio converter, which plugs into the optical audio output of your speakers and has an optical audio input for your TV. Here are the steps to connect your old 5.1 speakers to your TV using an optical audio converter:
- Turn off and unplug both your old 5.1 speakers and your TV.
- Locate the optical audio output on the back of your old 5.1 speakers. It should be labeled as OPTICAL OUT or something similar.
- Locate the optical audio input on the back of your TV. It should be labeled as OPTICAL IN or something similar.
- Plug one end of the optical audio cable into the optical audio output on your old 5.1 speakers.
- Plug the other end of the optical audio cable into the optical audio input on your TV.
- Turn on both devices and select the appropriate input source on your TV using the Input or Source button on your remote or TV.
- You should now be able to hear sound from both devices.
Q: How do I know if my TV supports 5.1 surround sound?
A: To know if your TV supports 5.1 surround sound, you can check the following:
- Look at the back or side of your TV and see if it has any audio outputs that are labeled as OPTICAL, COAXIAL, HDMI ARC, or AUDIO OUT. These are the types of outputs that can carry 5.1 surround sound signals to a compatible device, such as a soundbar, a receiver, or a home theater system.
- Check the audio settings on your TV and see if it has an option to enable or disable 5.1 surround sound. This may be called BITSTREAM, DIGITAL, or PASSTHROUGH. If it does, make sure it is enabled and matches the type of output you are using.
- Test your TV with a source that has 5.1 surround sound, such as a Blu-ray player, a streaming service, or a game console. Make sure the source is also set to output 5.1 surround sound and is connected to your TV with a compatible cable or method. You should be able to hear sound from all five speakers and the subwoofer, and your device may also display a 5.1 indicator.
Q: How do I connect old wired speakers to my TV?
A: Here are some possible ways to connect old wired speakers to your TV:
- If your TV has a 3.5mm headphone jack and your speakers have a 3.5mm audio input, you can use a 3.5mm audio cable to connect them. This can transmit stereo analog audio signals through a single cable. Make sure to adjust the volume and input source on both devices.
- If your TV and your speakers have different types of audio outputs and inputs, you may need to use an adapter or a converter to connect them. For example, if your TV has an optical audio output but your speakers have an RCA audio input, you can use an optical to RCA converter to connect them. Make sure to follow the instructions of the adapter or converter and select the correct input source on both devices.
Learn about how to make all speakers work on surround sound and also learn about how do home theater works.


