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1×8 HDMI Splitter with Independent 4K to 1080p Downscaling

Drive Eight Mixed-Resolution Displays From One 4K60 Source Without Collapsing to the Weakest Screen - 18Gbps 4:4:4, HDCP 2.2, EDID COPY/AUTO

SP-HDMI1X8-18GUPC 813982023017
1×8 HDMI Splitter with Independent 4K?1080p Downscaling – KanexPro SP-HDMI1X8-18G
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Overview

Drives eight mixed-resolution HDMI displays from a single 4K60 source without collapsing the whole array to the weakest screen. The SP-HDMI1X8-18G is a 1×8 HDMI 2.0 distribution splitter that passes the full 18Gbps 4:4:4 signal to all eight outputs and independently downscales 4K to 1080p on any port that needs it, so new 4K panels and legacy 1080p screens run natively off one feed. It ships in a black metal enclosure with an external 12V locking power supply and draws just 6.4W, making it the right choice for signage, hospitality, and corporate distribution where reliable mixed-resolution delivery and install-grade build matter more than 8K bandwidth or matrix switching.

A COPY/AUTO EDID dial resolves the mixed-wall problem at the source: COPY reads the display on HDMI OUT 1 and lets each output serve its connected screen, while AUTO reports the best common EDID so every display accepts the signal. Full HDR10, HDR10+, Dolby Vision, and HLG pass-through keeps signage color and small type clean, and CEC on HDMI OUT 1 lets the anchor display power-sequence with the source. Its strongest differentiator is genuine per-output 4K-to-1080p downscaling with full-chroma 18Gbps HDR pass-through in a metal chassis with a locking multinational supply — the pro-install combination that commodity USB-powered splitters skip and premium distribution amplifiers charge several times more to match.

Key features
  • HDCP 2.2 compliant
  • Video resolution up to 4K@60Hz 4:4:4, as specified in HDMI 2.0
  • Audio formats up to PCM 2CH, LPCM 7.1/5.1CH, Dolby Digital, DTS 5.1, Dolby Digital+, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, and DTS:X
  • HDR, HDR10, HDR10+, Dolby Vision, and HLG pass-through
  • Resolution downscaling from 4K to 1080p on each output
  • CEC support on the HDMI OUT 1 port
  • EDID management with COPY and AUTO modes
  • Compact metal enclosure for easy and flexible installation
Video / HDMI
HDMI ComplianceHDMI 2.0
HDCP ComplianceHDCP 2.2
Video Bandwidth18Gbps
Color SpaceRGB, YCbCr 4:4:4, YCbCr 4:2:2
Color Depth8-bit, 10-bit, 12-bit
HDRHDR, HDR10, HDR10+, Dolby Vision, HLG
Video Resolution (Input & Output)480i to 1080p50/60Hz, 4K×2K@24/30Hz, 4K×2K@60Hz
DownscalingPer-output 4K to 1080p
Audio
Audio FormatsPCM 2CH, LPCM 7.1/5.1CH, Dolby Digital, DTS 5.1, Dolby Digital+, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, DTS:X
Connections
Input1× HDMI IN (Type A, 19-pin female)
Output8× HDMI OUT (Type A, 19-pin female)
Control1× SERVICE (USB Type-C firmware update port)
Power
Power SupplyInput: AC 100–240V, 50/60Hz; Output: DC 12V/1A
Power Consumption6.4W (max)
Physical
HousingMetal enclosure, black
Dimensions (unit)9.53 × 4.02 × 0.63 in (242 × 102 × 16 mm)
Weight (unit, net)1.30 lbs (588 g)
Environmental
Operating Temperature32°F to 104°F (0°C to 40°C)
Storage Temperature-4°F to 140°F (-20°C to 60°C)
Operating Humidity20% to 80% RH, non-condensing
Storage Humidity10% to 90% RH, non-condensing
ESD ProtectionIEC 61000-4-2: ±8kV air-gap, ±4kV contact
Certifications
CertificationsCE, FCC, RoHS
Package Contents
Included1× 4K60 1×8 HDMI Splitter
Included1× 12V/1A multinational locking power supply
1×8 HDMI Splitter with Independent 4K to 1080p Downscaling panel drawing
1×8 HDMI Splitter with Independent 4K to 1080p Downscaling system diagram
1×8 HDMI Splitter with Independent 4K to 1080p Downscaling applications
What HDCP version does the SP-HDMI1X8-18G support?
It is HDCP 2.2 compliant, on an HDMI 2.0 signal path with 18Gbps of video bandwidth.
What audio formats will it pass through?
It passes PCM 2CH, LPCM 7.1/5.1CH, Dolby Digital, DTS 5.1, Dolby Digital+, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, and DTS:X.
Does the SP-HDMI1X8-18G support RS-232 or IP control?
No. Distribution behavior is set with the front-panel EDID dial switch (COPY or AUTO), and the USB Type-C SERVICE port is used only for firmware updates.
Can it pass CEC so a display can control the source?
CEC is supported on the HDMI OUT 1 port.
What connects to which port on the SP-HDMI1X8-18G?
Connect the HDMI source, such as a Blu-ray player or PC, to the single HDMI IN, and connect up to eight displays to HDMI OUT 1 through 8. Power connects to the DC 12V input.
How is the unit powered?
It is powered by the included 12V/1A multinational locking power supply, which accepts AC 100-240V at 50/60Hz.
Nothing appears on any of the connected displays. What should I check?
First confirm the POWER LED is lit blue, which means the unit has power from the DC 12V supply. Then check the IN LED is lit blue, which indicates the source is connected to HDMI IN, and finally check that the OUT LED lights for each connected display.
One output stays dark while the others work.
Check that the OUT LED for that port lights when its display is connected, since each OUT LED 1~8 lights only when a display is present on that output. Then reseat the HDMI cable at both ends and confirm it is a Premium High Speed HDMI cable.
My current splitter blanks every screen when one display is only 1080p. Does this fix that?
Yes. In COPY mode each of the eight outputs downscales on its own, so the 4K60 displays keep native 4K while a 1080p screen gets a 1080p feed from the same source. In AUTO mode the splitter compares all eight displays and sends one format they all accept, so every output runs 1080p when a 1080p disp
Does it pass HDR and full 4:4:4 color?
Yes. It passes the full 18Gbps HDMI 2.0 signal at 4K60 4:4:4, 8, 10 or 12-bit, with HDR10, HDR10+, Dolby Vision and HLG, to all outputs.
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