HDMI Splitter vs Switch

A client wants the cable box on the living room TV and the patio TV, or three sources on one screen. The HDMI splitter vs switch question comes down to which way the signals flow. Pick the wrong box and you get a mirrored picture where the client wanted a choice, or a 4K TV stuck at 1080p. This guide explains what each device does, where an HDMI matrix switch fits, and the EDID and HDCP handshakes that decide whether a job works.

HDMI splitter vs switch vs matrix: what each box does

All three sit between sources and displays, but they route the signal in different directions. The table sums up the differences installers ask about most.

None of them is bidirectional. A splitter wired backwards does not become a switch, because its input and output ports are built for one direction.

One source to two TVs: when a splitter fits

A splitter is right when every screen should show the same thing: a menu board, a waiting room channel, or a cable box mirrored to a second room. It is not the answer when two people want to watch different programs. That needs a second source or a matrix.

Before quoting one, check three things:

• Distance to each display. A splitter output drives an ordinary HDMI cable, so the limits in our guide to HDMI cable length limits apply to every output.
• The weakest display. An older TV on one output can change what the source sends to all of them, as the EDID section below explains.
• Audio. If a soundbar takes audio back from one TV, that is a return channel question, covered in HDMI ARC vs eARC.

When you need a switch or an HDMI matrix switch

A switch solves the opposite problem: too many sources and not enough inputs, or a projector with a single HDMI port. Most switches change input with a button, a remote or automatic detection.

Before adding a switch to a home theater, look at the system. An AV receiver is already a switch with an amplifier attached, so a system that needs surround sound may need a receiver rather than another box; our comparison of a soundbar vs AV receiver covers that choice. If the switch sits in a closed cabinet, plan how its remote commands will reach it; how an IR repeater works explains the usual fix.

An HDMI matrix switch is the step up when several screens each need their own choice of source. Size it by counting sources and displays now, then adding room for growth, because a matrix cannot gain ports later.

EDID: how the source decides what to send

Every display stores a small block of data called EDID that lists the resolutions, refresh rates and audio formats it accepts. When a source connects, it reads that data and picks a format the display can show.

A switch only has to pass along the EDID of one display. A splitter has to answer for several at once, and most handle it in one of three ways, usually set by a selector or DIP switch:

• Auto: the splitter reports only what every display supports. One 1080p TV pulls a 4K TV down to 1080p.
• Copy: the splitter reports the EDID of one chosen output, often output 1. Displays that cannot show that format may go blank.
• Fixed: the splitter reports a built-in format you select, regardless of what is connected.

When a client says the new 4K TV looks no better than the old one, check the splitter’s EDID setting before blaming the cable.

HDCP through a splitter or switch

Most commercial content is protected by HDCP, and a splitter or switch must take part in the handshake with the source and with every display. The HDMI Licensing Administrator’s HDMI testing requirements treat a repeater as its own licensed product type, separate from sources, sinks and cables. Splitters, switches and matrices generally sit in the chain in that repeater role.

The Digital Content Protection HDCP FAQs state that sources are required to support repeaters, and that HDCP 1.x and 2.x devices are combined through repeaters or converters with an HDCP 1.x interface. In practice, a 4K source usually requires HDCP 2.x end to end, so:

• Choose a splitter or switch that supports the HDCP version the source demands.
• Expect a blank screen on any output whose display supports only an older HDCP version, and check every display’s specification.
• Test with the client’s actual protected source before closing walls; a test pattern proves nothing about HDCP.

Buy from manufacturers that are HDMI Adopters, so the box has been through compliance testing.

Mixed-resolution displays and scaling

When a 4K TV and a 1080p TV share a splitter, an auto EDID setting gives both a 1080p picture. A splitter with a scaling output avoids that: it passes 4K to one output and converts a copy down to 1080p for the other.

Read the data sheet closely, because scaling support is narrow on many units. Some scale only from particular input formats, and HDR video converted for an older non-HDR display can look washed out. If the client cares about both screens, match the displays or use a matrix with scaling on the outputs that need it.

Powered vs passive, and when to use an extender

A true HDMI splitter is always powered, because it has to regenerate the signal for each output. A passive “splitter” cable with one plug and two sockets does not split video to two TVs; leave it out of the design. Small switches can be passive or draw power from the HDMI port, but a powered switch is more dependable at 4K and on longer cables, so plan an outlet for it.

A splitter or switch does not extend distance. If a display sits beyond what an HDMI cable can carry, use an extender, either with the splitter or instead of it. Our guide to HDMI over coax vs Ethernet compares extenders, modulators and HDMI over IP for that job.

Where to find HDMI distribution hardware

The A/V accessories category lists connection hardware, including an HDMI extender over a single Cat5e cable rated to 50 m. Cables, receivers and racks are in the Audio Video division.

For pricing and availability on splitters, switches and matrices, ask your sales representative through the Bursma contact page or the Grand Rapids area branch, or open a Bursma dealer account.

Frequently asked questions