J-Tech Digital HDMI Splitter 1x4, 4K 60Hz, HDR10 and Dolby Vision Review
A 1 input, 4 output HDMI splitter from J-Tech Digital rated for 4K at 60Hz with HDR10 and Dolby Vision support, automatically adjusting output resolution per display through its Multi-Resolution Output feature.
| Brand | J-Tech Digital |
|---|---|
| Color | Black |
| Configuration | 1 HDMI input, 4 HDMI outputs |
| Max resolution | 4K at 60Hz |
| HDMI version | HDMI 2.0, 18Gbps bandwidth |
| HDCP support | HDCP 2.3 and 2.2 |
| Best for | Sending one HDMI source to 4 displays at once, including a mix of 4K and older 1080p screens |
Product Overview
J-Tech Digital builds this as a 1 in, 4 out HDMI splitter, letting a single source such as a cable box, streaming device, game console or PC feed 4 displays at the same time. The headline spec is Multi-Resolution Output, which automatically adjusts the output resolution per display, keeping 4K content at 4K on compatible screens while downscaling to 1080p for older ones, rather than forcing every display to match the lowest common resolution.
Video support covers 4K at 60Hz with full HDMI 2.0 bandwidth at 18Gbps, HDR10 and Dolby Vision, and HDCP 2.3 and 2.2 compliance for modern streaming and gaming sources. Audio passthrough covers Dolby Atmos, Dolby TrueHD, DTS:X, DTS-HD and PCM, and an EDID copy function automatically pulls display settings from the primary output in a stated priority order.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
Feeds one HDMI source to 4 displays simultaneously.
Keeps 4K content at 4K while downscaling only for older displays.
Full HDMI 2.0 bandwidth supports high resolution and HDR content.
Maintains compatibility with modern streaming and gaming devices.
Supports Dolby Atmos, Dolby TrueHD, DTS:X, DTS-HD and PCM.
Automatically applies the best detected settings from the primary display.
Design and Build Quality
The unit is built around a single HDMI input feeding 4 separate HDMI outputs, with the listing specifying full HDMI 2.0 support at 18Gbps of bandwidth, enough headroom for 4K at 60Hz with chroma 4:4:4 sampling. HDCP 2.3 and 2.2 compliance is built in specifically to maintain compatibility with modern streaming devices and gaming consoles that enforce copy protection.
The package includes the splitter itself, a power adapter, and a user manual, with no additional cables bundled beyond what is needed to power the unit. The EDID copy function is a specific design choice meant to simplify multi-display setup, automatically applying the best detected settings from the primary display, with the listing specifying Output 1 takes priority over Output 2 when settings conflict.
Performance in Everyday Use
The core performance feature is Multi-Resolution Output, which the listing states automatically adjusts resolution so 4K content stays 4K on compatible displays while downscaling to 1080p on older screens, avoiding the common splitter problem of every output being forced to match the weakest connected display. Full HDMI 2.0 support at 18Gbps backs 4K at 60Hz with HDR10 and Dolby Vision, aimed at preserving contrast and color accuracy across all 4 outputs simultaneously.
Audio performance covers premium formats including Dolby Atmos, Dolby TrueHD, DTS:X, DTS-HD and PCM, intended for immersive surround sound on every connected display rather than only the primary one. HDCP 2.3 and 2.2 compliance is built specifically to keep the splitter working with current streaming and gaming devices that require up to date copy protection.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Resolution handling | Multi-Resolution Output across 4 displays | Listing states the splitter automatically adjusts output resolution, keeping 4K content 4K on compatible displays while downscaling for older screens | 8.3 | A named automatic resolution feature gives a concrete basis for the mixed-display claim |
| Bandwidth and HDR support | Full HDMI 2.0 at 18Gbps with HDR10 and Dolby Vision | Listing states full HDMI 2.0 support, 18Gbps bandwidth, HDR10, and Dolby Vision for enhanced contrast and vibrant colors | 8.1 | A specific bandwidth figure and two named HDR formats support the picture quality claim |
| Copy protection compliance | HDCP 2.3 and 2.2 compliant | Listing states the splitter is fully HDCP 2.3/2.2 compliant to work with modern streaming devices and gaming consoles | 8.0 | Named HDCP version compliance supports continued compatibility with current sources |
| Audio passthrough | Dolby Atmos, Dolby TrueHD, DTS:X, DTS-HD, PCM | Listing states it supports premium HD audio formats including Dolby Atmos, Dolby TrueHD, DTS:X, DTS-HD, and PCM | 7.9 | A specific list of named audio formats supports the immersive audio claim |
| Output configuration | 1 input split to 4 outputs | Listing states the splitter allows one HDMI source to be connected to 4 HDMI displays simultaneously | 8.2 | A specific input and output count confirms the stated multi-screen configuration |
| Setup convenience | EDID copy with stated priority order | Listing states the EDID copy function automatically detects and applies the best settings with a priority of Output 1 over Output 2 | 7.8 | A stated priority order confirms how the automatic setup feature resolves conflicting display settings |
Who Should Buy It
- Mirroring one HDMI source to 4 displays at once
- Mixed display setups combining 4K and older 1080p screens
- Home theater and gaming setups needing HDR10 and Dolby Vision support
- Multi-room audio and video setups needing premium audio passthrough
- Buyers needing to switch between several HDMI sources into one display, since this unit is built to split a single source out to multiple displays
- This is a splitter, not a switch, so it cannot select between multiple input sources
- Only 1 input is available, so feeding multiple sources requires separate switching hardware
- Only the Black colorway is covered by this specific listing
- No additional HDMI cables are bundled beyond the power adapter and manual
Full Specifications
How It Compares
| Feature | J-Tech Digital | Typical option | Higher-tier option |
|---|---|---|---|
| Output count | 1 input, 4 outputs | 1 input, 2 outputs only | 1 to 4 splitting |
| Resolution handling | Multi-Resolution Output per display | Forces all outputs to lowest common resolution | Per-display resolution adjustment |
| HDR support | HDR10 and Dolby Vision | Standard dynamic range only | HDR10 and Dolby Vision support |
| Copy protection | HDCP 2.3 and 2.2 compliant | Older HDCP standard only | HDCP 2.3/2.2 compliant |
| Device type | Splitter, mirrors one source | Switch, selects between sources | Source-splitting device |
Alternatives Worth a Look
This is a 1 input, 4 output HDMI splitter from J-Tech Digital rated for 4K at 60Hz with HDR10 and Dolby Vision over full HDMI 2.0 bandwidth, with HDCP 2.3 and 2.2 compliance and a Multi-Resolution Output feature that lets 4K content stay 4K while downscaling for older displays. It suits one-source, multi-display setups mixing newer and older screens, with the clear limitation being that it splits rather than switches between sources.
Frequently Asked Questions
How many displays can this feed at once?
4 displays from a single HDMI input, per the listing.
Does it support 4K?
Yes, up to 4K at 60Hz with full HDMI 2.0 bandwidth.
Does it support HDR?
Yes, both HDR10 and Dolby Vision are supported, per the listing.
Is it HDCP compliant?
Yes, HDCP 2.3 and 2.2 compliant, per the listing.
Can mixed resolution displays be connected?
Yes, the Multi-Resolution Output feature keeps 4K content at 4K while downscaling for older displays.
What is included in the box?
The splitter, a power adapter, and a user manual, per the listing.
Can this switch between multiple sources?
No, this is a splitter that mirrors one source to 4 outputs, not a source switch.
This review is based on the manufacturer's stated specifications, resolution handling and compatibility as listed. It is editorial analysis of the specifications and features as described, not hands on or long term use of this specific unit.