Connecting a Second TV to a Set-Top Box via Wi-Fi: A Complete Guide (2026)

Do you want to stream digital TV to a second TV without the hassle of wires and additional set-top boxes? Connect via Wi-Fi — the optimal solution if your main set-top box supports the function multi-screen or DLNAHowever, not all equipment models cope with this task equally well: some require additional devices (for example, TV tuners or media players), while others limit the number of devices that can be connected.

In this article we will look at all possible ways Connecting a second TV to a set-top box via a wireless network—from using built-in features to configuring your router and third-party apps. You'll learn which transmission protocols (Miracast, AirPlay, DLNA) are suitable for your equipment, how to avoid image lag, and what to do if the signal is interrupted. And also— Why Wi-Fi Direct connections are often more stable than those through a router, and when you need an additional adapter.

1. Checking hardware compatibility: what you need to connect

Before you begin setup, make sure your set-top box and TVs support the required technologies. Basic requirements:

• 📺 Main TV must be connected to the set-top box via HDMI and have access to Wi-Fi (or Ethernet for stability).
• 📡 Prefix must support DLNA, Miracast or multi-screen (For example, Tricolor TV+, MTS TV Set-Top Box 4K, Rostelecom SML-5344).
• 📺 Second TV must have built-in Wi-Fi-module or support the connection of an external adapter (for example, Google Chromecast, Xiaomi Mi TV Stick).
• 🌐 Router must work in the range 5 GHz (for minimal delays) or maintain MIMO for a stable signal.

If your set-top box does not support wireless broadcasting, you will need an additional device - TV tuner with retransmission function (For example, AVerMedia AVerTV Volar HD2) or media player (For example, NVIDIA Shield TV).

⚠️ Attention: Some providers (eg NTV-Plus) block signal transmission to a second device via Wi-Fi due to licensing restrictions. Check your plan's terms in your personal account.

2. Methods for connecting a second TV via Wi-Fi

There are three main methods for transmitting a signal from a set-top box to a second TV. The choice depends on the capabilities of your equipment:

The most versatile option is DLNA, but it's only suitable for watching recorded programs or unprotected channels (not all providers allow live TV broadcasts). For live broadcasts, it's better to use Miracast or specialized applications.

3. Step-by-step setup via DLNA (for set-top boxes with support)

If your console supports DLNA (For example, MTS TV set-top box or Rostelecom SML-292), follow these steps:

Enable DLNA in the set-top box menu (Settings → Network → DLNA)

Connect both TVs to the same Wi-Fi network

Launch the application on the second TV Media player or DLNA browser

Select the set-top box from the list of available devices-->

On consoles Tricolor TV+ The path to the settings may differ: go to Menu → Settings → Network Services → DLNA Server and activate the option. After this, the second TV should detect the set-top box as a media source.

⚠️ Attention: When broadcasting via DLNA it is possible no sound on some channels. This is due to the codec. AC-3, which older TV models don't support. The solution is to use an external sound system or a format converter.

4. Connect via Miracast/Wi-Fi Direct (live streaming)

This method is suitable for consoles with Android TV (For example, Xiaomi Mi Box S or NVIDIA Shield) and TVs with support Miracast (most models Samsung, LG, Sony after 2018). Advantage - minimal delay (up to 50 ms), which is critical for sports broadcasts.

Instructions:

1. Open it on your console Settings → Devices → Wireless Projection (or Miracast).
2. On the second TV, activate the function Screen Mirroring (on Samsung) or Wi-Fi Direct (on LG).
3. Select the set-top box from the list of available devices and confirm the connection.

If your TV doesn't support Miracast, use an adapter, such as Microsoft Wireless Display Adapter (connects via HDMI).

5. Configuring your router for stable streaming

Streaming quality depends on your router settings. Optimal parameters for video transmission:

• 📶 Range: 5 GHz (less interference, higher speed).
• 🔄 Channel width: 40 MHz or 80 MHz (4K requires 80 MHz).
• 🔒 Security mode: WPA2-PSK (avoid WPA3, if the TV does not support it).
• 📡 QoS: Enable traffic prioritization for devices with MAC addresses set-top box and TV.

On routers TP-Link path to QoS settings: Advanced settings → QoS → Rule settingsAdd the set-top box and TV to the list of high-priority devices by selecting the traffic type Video.

6. Alternative solutions: if the set-top box does not support Wi-Fi

If your set-top box is not able to broadcast a signal over the network (for example, older models GS U510 or D-Color DCI-5000), there are two options:

1. Use a TV tuner with retransmission (For example, AVerMedia or Hauppauge). Connect the tuner to the antenna, and then broadcast the signal to TVs via Plex Media Server or Kodi.
2. Use a Wi-Fi enabled HDMI splitter (For example, IOGEAR Wireless HDMI Extender). The device duplicates the signal from the set-top box and transmits it to a second TV via a separate network. 5 GHz.

These solutions cost between 3,000 and 10,000 rubles, but they guarantee stable operation without being tied to a provider.

How can I check if my set-top box is broadcasting via Wi-Fi?

Open the console menu and look for sections DLNA, Miracast, Multi-screen or Network servicesIf they're not there, your model doesn't support wireless streaming. An alternative is to install the app on your Android TV set-top box. LocalCast or BubbleUPnP (root rights required).

7. Common mistakes and how to avoid them

Even with proper setup, problems can arise. Here are the most common ones:

• 🔴 "Device not found" - Check that both TVs are connected one network (not to the guest). Disable the VPN on the set-top box.
• 🔴 "No image" - update the firmware of the set-top box and TV. LG may need to be enabled HDMI-CEC.
• 🔴 Sound Delay - in the TV sound settings, select PCM instead of Bitstream.

If the second TV Samsung, and the prefix is Rostelecom, you may need to disable the feature Anynet+ (HDMI-CEC) in the TV menu: it sometimes conflicts with broadcast protocols.

FAQ: Answers to frequently asked questions

Is it possible to connect a second TV to a set-top box without a router?

Yes, if both devices support Wi-Fi Direct or MiracastFor example, the prefix Xiaomi Mi Box S and TV Samsung QLED They can connect directly without a router. However, in this case, you won't be able to use the internet on other devices.

Why is there a 1-2 second delay when streaming via Wi-Fi?

Latency occurs due to:

• Using the range 2.4 GHz (switch to 5 GHz).
• A weak processor in the console (for example, in budget models D-Color).
• Real-time video encoding (solution - use DLNA for recorded broadcasts).

Is it possible to stream TV to a smartphone or tablet?

Yes, if the console supports it DLNA or does it have a mobile app (for example, Tricolor TV+ or MTS TV). For Android-the app is suitable for all devices BubbleUPnP, For iOS — nPlayerPlease note that providers may block broadcasting to mobile devices.

What equipment is needed to stream 4K over Wi-Fi?

To transmit video in resolution 3840×2160 (4K) you will need:

• Router with support Wi-Fi 5 (802.11ac) or Wi-Fi 6.
• Set-top box with output HDMI 2.0 (For example, Apple TV 4K or NVIDIA Shield TV Pro).
• TV with module Wi-Fi 5 GHz (most models Sony Bravia 2020+).

The connection speed must be no less than 25 Mbps for compressed 4K and 50 Mbps for uncompressed.

What should I do if my provider blocks broadcasting to a second TV?

Some operators (eg. NTV-Plus) limit the number of connected devices. Workarounds:

• Use HDMI splitter (physical separation of signal).
• Connect a second TV via IPTV (if the provider provides logins for IPTV player).
• Install on the console TVHeadend (required) root and technical skills).

Please note that bypassing blocking may violate the user agreement.