Name: 4K60 4:4:4 1×4 HDMI Distribution Amplifier with EDID Management
Brand: KanexPro
SKU: SP-HDMI1X4-18G

Question 1

What is the maximum HDMI cable length at each resolution?

Accepted Answer

At 4K60 the recommended maximum HDMI cable length is 26 ft (8 m); at 1080p it is 49 ft (15 m). KanexPro recommends a Premium High Speed HDMI cable.

Question 2

What color depths and color spaces does it pass?

Accepted Answer

It passes 8-bit, 10-bit and 12-bit color depth across RGB, YCbCr 4:4:4, YCbCr 4:2:2 and YCbCr 4:2:0.

Question 3

Does the SP-HDMI1X4-18G need a control system or an RS-232/IP controller?

Accepted Answer

No. It carries no RS-232, Telnet or network control; the only setting control is the front-panel EDID dial switch, and the USB Type-C SERVICE port is for firmware updates only.

Question 4

What sources and displays does it sit between?

Accepted Answer

It takes one HDMI source, such as a DVD or Blu-ray player or a PS5, and feeds four separate displays (for example TV 1 through TV 4) at the same time.

Question 5

How is the SP-HDMI1X4-18G powered?

Accepted Answer

Use the included DC 5V/1A power supply into the DC 5V input port on the rear; the unit draws 3W maximum.

Question 6

What connects to each port?

Accepted Answer

Connect the HDMI source, such as a Blu-ray player or PS5, to HDMI IN, and connect up to four displays to HDMI OUT 1 through 4 using HDMI cables.

Question 7

The unit shows no sign of power. What do I check?

Accepted Answer

The red POWER LED lights when the device is powered on; if it stays dark, confirm the included DC 5V/1A supply is connected to the DC 5V input port.

Question 8

One display is blank while the others work. Where do I start?

Accepted Answer

Each HDMI OUT has a green LED that lights when a display is connected, so check that output's LED and its HDMI cable; at 4K60 keep the cable within 26 ft (8 m).

Question 9

Does this splitter downscale, so I can mix a 4K display with 1080p ones?

Accepted Answer

No. SP-HDMI1X4-18G is a straight 1-to-4 mirror: every output carries the same signal. For mixed-resolution displays that need per-output downscaling, the SP-HD1X48K (8K 1x4 with auto downscaling) is the right choice. If the mix is only for compatibility, set the EDID dial to STD and all four outputs

Question 10

Will it keep 4K60 with full color and HDR on all four outputs?

Accepted Answer

Yes. The unit runs at 18Gbps and passes 4K60 4:4:4 at 8, 10 or 12-bit with HDR10, HDR10+, Dolby Vision and HLG to all four outputs at once.