Quick answer: A splitter takes one HDMI source and sends the same picture to two or more displays at the same time. A switch does the opposite: several sources, one display, selected with a button or a remote. Buy a powered 1×2 splitter for AUD 35 to 70 when a bar, a gym or a shop window needs identical screens, and buy a switch when one TV has to share a console, a box and a laptop. Neither part converts a signal, so match it to the plugs you already own.
Two screens showing the same thing looks like a cabling problem and is really a direction problem. Splitters and switches sit on the same retail shelf, look alike and are routinely confused, and the wrong one produces a picture that appears on one display only or not at all. Drawing the arrows from source to display before you buy settles it in under a minute.
When you actually need a splitter
Two screens, one picture
A splitter is the right part when one source must drive several displays with identical content: a pub with a screen in each bar, a gym with a row of TVs on the same feed, a shop window repeating a promo. The source sees one display and sends one stream, and the splitter copies the electrical signal to each output port.
Cases a splitter cannot solve
It cannot give two people different content, and it cannot extend a desktop across two screens. That needs two graphics outputs, not a splitter. It also cannot rescue a source that refuses to output when it sees a long cable, because the copy still has to travel down each leg with the same bandwidth budget as before.
Splitter versus switch
Direction of the signal
Draw arrows before buying. One arrow out of the source and two arrows into displays means a splitter. Two arrows out of two sources and one arrow into a display means a switch. A matrix box does both at once with four inputs and four outputs, costs several hundred dollars, and belongs in an AV rack rather than a lounge room.
Automatic switching and remote control
Most switches sense a new active input and jump to it, which is convenient until a set top box wakes at 3 am and takes the screen. Look for a switch with a manual override and a physical button. Splitters rarely switch anything, but they do need power for the copy circuit and the equaliser on each output.
EDID, HDCP and the copy that will not play
The lowest common display rule
The splitter reads the EDID of every connected display and hands the source a capability set that all of them can accept. Connect a 4K panel and a 1080p panel and the source will usually drop to 1080p, or to 4K30, for both. Some splitters include an EDID switch that fixes the output at one format, which avoids the screen blanking each time a display wakes.
| Device | Ports | Max resolution | HDCP | Price (AUD) |
|---|
| 1×2 splitter | 1 in, 2 out | 4K60 | 2.2 | 35 to 70 |
| 1×4 splitter | 1 in, 4 out | 4K60 | 2.2 | 70 to 140 |
| 2×1 switch | 2 in, 1 out | 4K60 | 2.2 | 30 to 60 |
| 4×1 switch | 4 in, 1 out | 4K120 | 2.3 | 90 to 180 |
| 4×4 matrix | 4 in, 4 out | 4K60 | 2.2 | 400 to 900 |
HDCP 2.2 and 4K sources
Protected content from a streaming stick or a Blu-ray player needs HDCP 2.2 end to end. One non-compliant display in the chain can knock the whole group back to 1080p or produce a blank screen with an error message. If a copy plays on one output and not the other, swap the displays to see which one is dragging the group down.
Cable length on every leg
Powered splitters and the 5 V budget
A splitter with four outputs is driving four cables at once, so its 5 V rail has to supply the equaliser in each port. Cheap units share one regulator and sag when two long cables are fitted. Use the supplied 5 V power pack rather than a USB port on the TV, and keep each leg under 5 m at 4K60 unless it is active.
For a multi-screen install, send the layout and the leg lengths to zongcarrie@zh-zong.com or call +86 13543026126, and we will quote a HDMI splitter 1×2 with the right output count plus an HDMI cable extender or HDMI cable tester for any leg that runs past 5 m. Getting the leg budget right at the quote stage is cheaper than adding parts after the ceiling is closed.
Practical scenarios
- Situation: A Fortitude Valley bar with three screens, one 4K and two 1080p. What to do: Fit a 1×4 splitter with a fixed 1080p EDID.
- Situation: A Gold Coast townhouse with a console, a Fetch box and a projector. What to do: Use a 3 input switch with a manual button and one 3 m cable.
- Situation: A shop window in Adelaide looping a promo on two panels 20 m apart. What to do: Split at the player and extend each leg over Cat6.
- Situation: A North Sydney meeting room screen shared by six laptops. What to do: Fit a 6 input switch under the table and label the ports.
FAQ
Can a splitter send different content to each screen?
No. A splitter copies one stream to every output, so all screens show the same thing. Different content on each screen needs a matrix switch with independent routing, or two separate sources, which is a much larger and more expensive box.
Why did both screens drop to 1080p?
The splitter negotiated a format that every display accepts, and the weakest display set the ceiling. Fix the EDID switch to the format you want, or remove the older display from the group. Some splitters also cap output when one port is empty.
Do I need a powered splitter for two short cables?
A passive 1×2 unit often works at 1080p over 2 m. At 4K60, buy a powered model, because the copy circuit and the equalisers draw more than the source port will supply. Unpowered units at 4K tend to drop out when the display wakes.
