HDMI Splitter 1 in 4 Out 4K 120Hz - 4 Way HDMI2.1 Duplicator

In this review the HDMI Splitter 1 in 4 Out 4K 120Hz is recommended for users who need to duplicate a single HDMI 2.1 source to multiple displays without changing the video content. The bottom line: it is best for gamers and AV hobbyists who want to send a PS5 or 4K media player to four TVs, monitors, projectors or a hue light sync box at high refresh rates, because it supports 4K 120Hz, HDR, VRR and HDCP2.3 while offering simple one-input-to-four-output duplication rather than multi-monitor extended desktop use.

Key Features

• HDMI 2.1 1x4: Splits one HDMI source into four identical HDMI outputs so the same signal appears on all connected displays.
• High refresh and HDR support: Handles 4K 120Hz and HDR content for smoother gaming and brighter video on compatible screens.
• Scaling options: Can scale down 4K 120Hz to 1080p 120Hz or 4K 60Hz to 1080p 60Hz to match older displays.
• Broad device compatibility: Accepts inputs from PS5, set top boxes, computers and media players and outputs to TVs, monitors, projectors and hue sync boxes.
• HDCP compliance: Supports HDCP1.4, HDCP2.2 and HDCP2.3 to work with protected content across multiple displays.
• Audio channel support: Provides up to 7.1 channel audio on HDMI outputs for multichannel setups (ARC/eARC not supported).

Who It's For

This splitter is aimed at gamers, home theater builders and content creators who need to mirror a single HDMI 2.1 source to multiple screens or accessories like a hue light sync box. It fits particularly well in setups where identical output is required on four displays or when routing a PS5 signal to several TVs for demos, events or multi-room mirroring.

It is not for users who want to extend a PC desktop across separate monitors or who need ARC/eARC support for TV audio return. Also, those who require 8K 60Hz RGB444 downscaling to 4K60 should verify their source/output color format, since certain 8K 444 inputs are not converted to 4K60 RGB444 by this unit.

Pros & Cons

Pros

• Reliable duplication of one HDMI source to four outputs with support for HDCP2.3.
• Supports high frame rates like 4K 120Hz and can scale down to 1080p 120Hz for older displays.
• Works with a wide range of inputs and outputs including game consoles and hue sync boxes.

Cons

• Does not support ARC or eARC, so it cannot replace an A/V receiver for audio return.
• Not suitable for extending PC desktops; it only duplicates the same image to all outputs.

Specifications

Product Type	HDMI 2.1 1 in 4 out splitter
Maximum Resolution/Refresh	4K 120Hz (supports 4K144Hz/4K120Hz)
HDCP Support	HDCP1.4, HDCP2.2, HDCP2.3
Scaling	4K120 to 1080p120, 4K60 to 1080p60, 8K60 YUV422/420 to 4K60/1080p60
Audio	Up to 7.1 channel over HDMI (no ARC/eARC)
Inputs	1 HDMI input (computer, PS5, set top box, media player)
Outputs	4 identical HDMI outputs (TV, monitor, projector, hue sync box)

Our Verdict

The HDMI Splitter 1 in 4 Out 4K 120Hz is a practical, cost-conscious choice for anyone who needs to mirror a high-bandwidth HDMI source to multiple displays. It delivers strong compatibility with modern consoles and supports high refresh rates and HDR, making it good value for multi-display mirroring where audio return and extended desktop functions are not required.

Frequently Asked Questions

Can this splitter handle a PS5 at 4K 120Hz?
Yes, it supports PS5 input and can pass 4K 120Hz when connected with HDMI 2.1 cables and compatible displays.

Will it extend my PC desktop across four monitors?
No, this device duplicates a single HDMI input to four identical outputs and does not support extended desktop modes.

Does it support ARC or eARC for TV audio return?
No, ARC and eARC are not supported by this splitter; it only carries standard HDMI audio up to 7.1 channels.