HDMI Splitter 1 in 2 Out 4K 120Hz - 4K/8K HDMI Duplicator

In this review the HDMI Splitter 1 in 2 Out 4K 120Hz is judged as a practical tool for gamers and home theater owners who need to mirror one HDMI source to two displays or capture devices. The bottom line: it is best for anyone who wants reliable duplication of a single HDMI 2.1 feed with support for high refresh rates and audio extraction; the reviewer found it especially useful when sending the same PS5 Pro or PC console signal to a TV and a capture card or soundbar at the same time.

Key Features

• HDMI 2.1 support: Handles up to 4K@144Hz and 8K@60Hz so modern consoles and GPUs keep their high refresh rate output when duplicated.
• Audio extraction: Built-in SPDIF and 3.5mm outputs let users send multichannel audio to a soundbar or older receiver while keeping HDMI outputs for displays.
• EDID and HDCP handling: Supports HDCP 2.3/2.2/1.4 and EDID management to improve compatibility with capture cards and displays that require specific handshake behavior.
• Downscale and duplicate: Can downscale 4K120 to 1080P120 or adapt 8K60 YUV422/420 to lower resolutions for TVs or capture devices that cannot accept the native source signal.
• Single-source mirroring: Splits one input into two identical outputs, ideal for mirroring to a TV and a monitor or capture card without extending displays.

Who It's For

This splitter is aimed at console players, streamers, and home theater users who need to mirror a single HDMI source to two endpoints. It is particularly useful for PS5 Pro owners who want to feed a TV and a capture card simultaneously, or for setups that include a soundbar plus a display.

It is not for users who need a multi-input switch, a bidirectional matrix, or to extend a PC desktop across multiple monitors. If you require independent signals on each output or a 2-in 1-out workflow, look for a different device designed for multi-source routing.

Pros & Cons

Pros

• Supports high bandwidth HDMI 2.1 features including 4K120/144Hz and 8K60 for future-proofing.
• Includes SPDIF and 3.5mm audio outputs so audio can be routed to soundbars or receivers independently.
• EDID management and HDCP support improve compatibility with capture cards and protected content sources.

Cons

• Does not extend displays or support two different outputs; it only duplicates the same signal to both outputs.
• Some advanced downscaling combinations (such as 8K RGB444 to 4K60) are not supported and require specific YUV formats.

Specifications

Product type	1 in 2 out HDMI splitter / duplicator
HDMI version	HDMI 2.1
Maximum bandwidth	48 Gbps (supports high refresh rates)
Max resolutions	8K@60Hz, 4K@144Hz, 4K@120Hz
Audio outputs	SPDIF (5.1/2.0), 3.5mm (2.0CH), HDMI output supports 7.1
HDCP	HDCP 2.3 / 2.2 / 1.4

Our Verdict

The HDMI Splitter 1 in 2 Out 4K 120Hz is a solid choice for anyone needing to mirror a high-bandwidth HDMI source to two devices while retaining audio extraction and compatibility options. For streamers, console owners, and home theater setups that require a simple duplicator with EDID and HDCP handling, it offers good value and practical features, as long as you only need mirrored outputs rather than independent displays.

Frequently Asked Questions

Can this split a PS5 Pro to a TV and capture card at the same time?
Yes. It is designed to duplicate one HDMI source to two outputs and supports PS5-level resolutions and HDCP handling for capture workflows.

Does it support extending a desktop to two monitors?
No. This unit only duplicates one input signal to two identical outputs and cannot create extended independent displays.

What audio formats are available from the extractor outputs?
SPDIF supports 5.1 and 2.0 channels, the 3.5mm jack supports 2.0 channels, and HDMI outputs can carry up to 7.1 channels.