StarTech ST124HDMI2 4-Port 1080p HDMI Splitter

Overview

The StarTech ST124HDMI2 is a 1x4 HDMI splitter built to push a single HDMI source out to four displays simultaneously at up to 1080p resolution. It's the right fit for lobby video walls, small digital signage runs, control-room mirrored monitors, or any install where the same image and audio need to land on multiple screens without daisy-chaining or re-encoding hardware. As a powered, standalone distribution unit, the ST124HDMI2 sits between a source (media player, PC, DVR/NVR output) and up to four displays wired independently.

Key Features

• 4 HDMI Video Output Ports: drives four displays off one source simultaneously — useful for matched signage runs or mirrored monitoring stations where every screen needs to show identical content without a separate player at each display.
• 1080p Maximum Resolution: matches the output ceiling most commercial displays and control-room monitors already run at, so you're not paying for 4K bandwidth you won't use on standard-definition signage or monitoring setups.
• 50 ft Maximum Cable Length: gives enough reach to place displays in adjacent rooms or across a larger lobby without adding inline extenders, which cuts one more point of failure out of the signal chain.
• External Power Supply (100-240V AC Input): the universal AC input means the ST124HDMI2 runs on standard mains power in any region without a separate voltage-selector step, simplifying stock-keeping for multi-site deployments.
• 12V DC / 1.5A Output, 18W Power Consumption: a modest power draw that keeps the unit cool for 24/7 signage or monitoring duty and won't strain a shared power strip alongside other rack gear.
• 0C to 40C Operating Range: covers typical indoor commercial environments — server closets, back-of-house AV racks, retail back rooms — without added cooling considerations.
• Steel Housing: a metal chassis stands up to rack and shelf mounting in commercial AV closets better than a plastic enclosure, and shields the internal circuitry from EMI in gear-dense racks.
• Compact Footprint (8.7 x 5.3 x 1.7 in, 34.1 oz): low-profile enough to sit on a shelf or tuck into a rack tray without eating significant space in an already-crowded AV closet.

Integration & Compatibility

The ST124HDMI2 works as a source-agnostic HDMI distribution point — feed it from a media player, a PC, or a DVR/NVR HDMI output and it mirrors that signal to all four connected displays at once. This is a straightforward drop-in for anyone building out a network video recorder monitoring wall where a single NVR output needs to reach several screens, or a signage setup fed from a single StarTech-driven signal chain. For longer distance runs or larger fan-out beyond four displays, check the broader StarTech catalog for HDMI extenders and larger-count splitters, and review a video distribution planning guide before finalizing your display count and cable lengths. If you're wiring an equipment mount alongside this in a rack, confirm shelf depth against the ST124HDMI2's 8.7-inch length before ordering.

Frequently Asked Questions

Q: How many displays can the ST124HDMI2 drive at once?

A: Four displays simultaneously, each showing the same mirrored HDMI signal and audio from a single source.

Q: What's the maximum resolution supported?

A: 1080p across all four outputs.

Q: How long a cable run can I use with this splitter?

A: Up to 50 ft maximum cable length per the manufacturer specification.

Q: Does the ST124HDMI2 need external power?

A: Yes — it ships with a power supply accepting 100-240V AC input and outputting 12V DC at 1.5A, drawing about 18 watts.

Q: What's the warranty on the ST124HDMI2?

A: A 2-year manufacturer warranty.

Jerry Tildsen

I get asked a lot about mirroring one HDMI feed across several monitors without daisy-chaining displays, and the ST124HDMI2 is a clean answer for that — one input, four independent 1080p outputs, no re-encoding involved.

Technical Highlights:

• 4-Port Output: fan-out to four displays off a single source cuts the need for four separate players or a matrix switcher when all screens just need to show the same thing.
• 50 ft Max Cable Length: enough headroom to route to a display in the next room without an inline extender in the chain.
• 18W Power Draw at 12V/1.5A: low enough that it won't tax a shared rack power strip running alongside recorders and switches.

Deployment Considerations:

• Steel housing holds up better than plastic splitters in a rack or AV closet where it'll sit long-term next to other gear.
• 1080p is the resolution ceiling here — if any downstream display or source is 4K, the ST124HDMI2 will not pass that resolution through, so confirm your source and displays are 1080p or lower before specifying it.

I'd spec the ST124HDMI2 for a small monitoring wall behind a reception desk or a back-office control station where one DVR or PC output needs to mirror across four screens — not for a digital signage network that's already running 4K content.