SP-HD1X28K 8K HDMI 2.1 1×2 Splitter: What It Is and Where to Use It
SP-HD1X28K splits one HDMI 2.1 source to two displays at up to 8K60 4:2:0 or 4K120 4:4:4, downscaling and converting HDR to SDR per output.
The SP-HD1X44K is a 1x4 HDMI splitter. It sends one HDMI source to four displays at the same time, at up to 4K2K@50/60Hz 4:2:0 or 4K2K@30Hz 4:4:4, and passes HDR10, HDR10+ and Dolby Vision. It is built for jobs where one player, laptop or set-top box feeds several screens, including rooms that mix different displays. A switch on the panel sets the EDID to STD or TV mode, so the source settles on a resolution every connected screen can show.
Applies to: SP-HD1X44K 4K 1×4 HDMI Splitter with HDR and EDID Management
What does the SP-HD1X44K do, and what signals does it carry?
It copies one HDMI input to four HDMI Type A outputs. Video bandwidth is 10.2Gbps. Supported resolutions are 4K2K@50/60Hz 4:2:0, 4K2K@30Hz 4:4:4, 1920x1200, 1080p, 1080i, 720p and 480p, plus all HDMI 3D formats. Colour space covers RGB, YCbCr 4:4:4, 4:2:2 and 4:2:0, at 8/10/12-bit colour depth. Audio passes through with the video. That includes PCM 2.0/5.1/7.1CH, Dolby Digital/Plus/EX, Dolby TrueHD, DTS-HD Master Audio, DTS High Res and DSD. No driver is needed: it is plug and play.
Does it support Dolby Vision and HDR?
Yes. The specification lists HDR10, HDR10+ and Dolby Vision. Each is passed to all four outputs. The splitter does not convert or tone-map HDR, so each display still has to support the HDR format the source sends.
Which HDCP version does it support?
HDCP 1.4 only. If the source sends content protected with HDCP 2.2, it may not pass through, and the displays can show an HDCP error. For HDCP 2.2 content, look at the SP-HD20-1X44K instead.
Can I force every output to 1080p?
Yes. Use the EDID switch on the panel, which has two modes:
- STD tells the source to send 1080p@60Hz with 2-channel audio to all outputs. Choose this when the displays are unknown or change from job to job, because nearly any HDMI screen accepts 1080p@60Hz.
- TV copies the EDID of the display on OUT 1 to all outputs, so every screen gets the same resolution. Connect the display you most want to drive at full resolution to OUT 1. Every display has to support the format that display asks for.
If one or more screens show no picture, the approved fix is: check the HDMI cables, set the switch to STD, then power-cycle.
What power does it need, and can I get a spare adapter?
It runs on an external adapter rated at input AC 100-240V 50/60Hz and output DC 5V/1A. That adapter comes in the box. The plug is a 5.5 x 2.1 mm centre-positive barrel. The matching spare AC adapter is the KanexPro EXT-PSU3. The splitter can also run from a 5V USB-A port, using a USB-A to 5.5 x 2.1 mm centre-positive barrel cable. Maximum power consumption is 1W.
What is the SERVICE port for?
The Mini USB-B SERVICE port is only for firmware updates. Nothing needs to be connected to it during normal use.
What comes in the box?
One 10.2Gbps 1x4 HDMI splitter, one DC 5V/1A power adapter and one user manual. The housing is a black metal enclosure.
Key specifications
| HDCP Compliance | HDCP 1.4 |
| Video Bandwidth | 10.2Gbps |
| Video Resolution | 4K2K@50/60Hz 4:2:0, 4K2K@30Hz 4:4:4, 1080p, 1080i, 720p, 480p, All HDMI 3D formats, 1920x1200 |
| HDR Formats | HDR10, HDR10+, Dolby Vision |
| Color Depth | 8/10/12-bit |
| Input | 1 x HDMI Type A [19-pin female], 1 x SERVICE [Mini USB-B] |
| Output | 4 x HDMI Type A [19-pin female] |
| Power Supply | Input: AC 100-240V 50/60Hz, Output: DC 5V/1A |
| Power Consumption | 1W (Max) |
| Dimensions | 163mm (W) x 63mm (D) x 16mm (H) |
| Weight | 260g |
| Operating Temperature | 0°C - 40°C / 32°F - 104°F |