HDMI 2.1 Splitter 1 in 4 Out - 8K60/4K120Hz Mirroring for Multiple

In this review the HDMI 2.1 Splitter 1 in 4 Out is evaluated for users who need to mirror a single HDMI source to several displays without losing quality. The bottom line: it is a straightforward, reliable solution for sharing one console or media player across up to four screens, with support for high resolutions and modern audio formats. This reviewer found the unit especially useful for gamers and AV setups that require identical output on each screen, and appreciated the automatic EDID detection that largely eliminates manual configuration.

Key Features

• 1 in 4 mirroring: Mirrors one HDMI input to four outputs simultaneously, delivering identical video and audio to each connected display without perceptible signal loss.
• 8K and 4K support: Outputs up to 8K60Hz on compatible displays and 4K120Hz for high refresh rate gaming, ensuring sharp detail and smooth motion for fast content.
• Automatic EDID detection: The splitter detects EDID automatically so users rarely need to change settings, and a Reset button restores image if a display fails to show output.
• Audio passthrough: Supports common surround formats including DTS 5.1/7.1 and Dolby Digital variants so soundbars and amplifiers can receive full digital audio from the source.
• Mixed resolution outputs: Auto downscaling lets one output run 8K while others run 4K or 1080p to match each TV's capabilities without manual switching.
• Complete kit and support: Ships with the splitter, power adapter and manual, and includes vendor support for setup questions.

Who It's For

This product is aimed at home theater enthusiasts, gamers, and installers who want to mirror one HDMI source like a game console, streaming stick or capture device to multiple TVs or displays. It is particularly useful when you need identical output on every screen for demos, multi-room viewing, or a gaming setup with a soundbar and several screens.

People who need extended desktop capability (different content on each screen), or who want to mirror smartphones, tablets or iPads, should look elsewhere because the device only mirrors a single HDMI input and is not compatible with mobile device outputs. Also avoid it if you need ARC/eARC-only soundbar passthrough, since some ARC/eARC-only soundbars are not compatible.

Pros & Cons

Pros

• Supports high resolutions including 8K60Hz and 4K120Hz for smooth gaming and crisp video across multiple displays.
• Automatic EDID detection simplifies setup and reduces the need for manual configuration.
• Audio passthrough supports common surround formats so soundbars and amplifiers can receive full digital audio.
• Mixed resolution auto downscaling lets different TVs display at their native recommended resolution.

Cons

• Does not support extended displays with different content; only mirrors the same input to all outputs.
• Not compatible with soundbars that accept only ARC/eARC or with mobile device HDMI outputs.

Specifications

Product type	HDMI 2.1 splitter 1 in 4 out
Maximum video	8K60Hz; supports 4K120Hz
Audio formats	DTS Digital, DTS X, DTS 5.1/7.1CH, Dolby Digital, DTS HD, Dolby True HD, PCM
Auto features	Automatic EDID detection; auto downscaling for mixed resolutions
Included in box	Splitter unit, power adapter, user manual
Limitations	No extended displays; not compatible with smartphones/tablets; no ARC/eARC-only soundbar support

Our Verdict

The HDMI 2.1 Splitter 1 in 4 Out is a practical, good-value choice for anyone who needs to mirror a single HDMI source to multiple screens with full resolution and audio support. It is especially recommended for gamers and multi-room AV setups where identical output is required, thanks to 4K120Hz capability and automatic EDID handling that make setup painless.

Frequently Asked Questions

Can I connect multiple game consoles at once?
The splitter mirrors one HDMI input to four outputs and does not support connecting multiple HDMI sources simultaneously.

Will it work with my soundbar?
It supports audio passthrough for many formats, but it does not work with soundbars that only accept ARC/eARC connections.

Can different TVs receive different resolutions?
Yes, the unit auto downscales so one display can show 8K while others show 4K or 1080p, but mixed refresh rates are not supported.