StarTech HDBOOST4K 4K HDMI Signal Booster and Repeater

Overview

The StarTech HDBOOST4K is a compact, inline HDMI signal booster designed to overcome the cable-length limitations that degrade high-resolution video before it reaches the display. When you push 4K content over standard passive HDMI cables beyond their rated distance, you get signal dropout, color loss, or a blank screen — this repeater re-clocks and amplifies the signal mid-run to restore full integrity. At 4K 60Hz, it supports runs up to 30 ft (10 m); drop to 4K 30Hz and that extends to 82 ft (25 m); at 1080p, you can reach 115 ft (35 m) without a separate power brick. Whether you're driving a conference room display, a digital signage endpoint, or a control room monitor from a distant source, the HDBOOST4K keeps the signal clean across resolutions.

For integrators and AV architects working with StarTech signal extension products, this repeater fits anywhere a passive HDMI cable is close to or past its reliable transmission distance — no additional power supply, no rack space consumed.

Key Features

• 4K 60Hz at up to 30 ft (10 m): At full 4:4:4 4K 60Hz, passive HDMI cables typically start degrading around 15–20 ft depending on cable quality. The HDBOOST4K gives you a clean 30 ft at peak resolution — enough for most in-room or short inter-rack runs where a standard cable alone won't reliably hold 4K 60Hz.
• 4K 30Hz reach extended to 82 ft (25 m): When your source runs 4K 30Hz — common for video conferencing endpoints, media players, and some capture cards — the booster stretches the viable cable run to 82 ft. That covers most conference rooms and single-floor AV distribution runs without active fiber or HDBaseT infrastructure.
• 1080p support to 115 ft (35 m): If your display or source is limited to 1080p, the HDBOOST4K extends that signal to 115 ft — useful for legacy display installations or controlled environments where 1080p is the defined standard and long cable runs are unavoidable.
• HDCP 2.2 compliance: Supports HDCP 2.2 copy protection, meaning it will pass protected 4K content from streaming devices, Blu-ray players, and cable/satellite sources without triggering handshake failures at the display. If your content chain includes any HDCP 2.2-required sources, a non-compliant booster will block playback — this one won't.
• 7.1 surround sound audio pass-through: Passes up to 7.1 channel surround audio alongside video, so AV deployments with AVRs or professional audio processors in the signal chain don't need a separate audio extractor or a downmixed signal.
• USB-powered at 5V DC: Draws power from a standard USB port — a display USB port, a laptop, a wall charger, anything with a standard USB-A output at 5V. No power supply to source, no outlet to claim at the install point. If no USB port is available nearby, that's the one dependency to plan for.
• Compact inline form factor (2.2 x 1.8 x 0.6 in): At 5.3 oz and roughly the size of a small deck of cards, this sits behind a display or inside a rack without cable management becoming a problem. It installs inline — HDMI in on one side, HDMI out on the other — no mounting hardware required.
• Operating temperature 0°C to 35°C: Rated for standard indoor environments. This is not a ruggedized or wide-temperature-range device — it belongs in a conditioned space, not an equipment closet that swings to temperature extremes.

Integration and Compatibility

The HDBOOST4K connects between any HDMI source and HDMI display — it is signal-format agnostic within HDMI 2.0 parameters and does not require drivers or configuration. It works with 4K displays, 1080p displays, projectors, video walls, and any HDMI-connected source including computers, media players, video conferencing codecs, and matrix switchers. Because it supports HDCP 2.2, it is compatible with the full DRM handshake chain required for protected content distribution.

If your project involves longer structured cabling runs beyond the distances this booster supports, consider HDMI extenders over Cat6 or fiber for runs exceeding 115 ft at any resolution. For installations requiring centralized AV distribution to multiple displays, a matrix switcher paired with dedicated per-output signal extension is the more appropriate architecture than daisy-chaining repeaters.

For broader AV distribution planning, the AV over IP buying guide covers when inline repeaters are the right tool versus when you need a full distribution architecture. If you're planning PoE-powered endpoint displays or AV-over-IP nodes, pairing this booster with a managed PoE switch for power delivery at the display end is a common approach in conference room deployments.

Frequently Asked Questions

Q: What is the maximum cable run supported at 4K 60Hz with the HDBOOST4K?

A: The HDBOOST4K supports 4K at 60Hz over cable runs up to 30 ft (10 m). For longer runs at reduced frame rates, it supports 4K at 30Hz up to 82 ft (25 m) and 1080p up to 115 ft (35 m).

Q: Does the HDBOOST4K require an external power supply?

A: No. The HDBOOST4K is USB-powered at 5V DC. It draws power from any standard USB port — a display USB port, a PC, or a USB wall charger. No dedicated power adapter is included or required, but a USB power source must be available at the install point.

Q: Does the HDBOOST4K support HDCP 2.2?

A: Yes. The HDBOOST4K supports HDCP 2.2, which is required to pass protected 4K content from streaming devices, 4K Blu-ray players, and similar sources. It will not block or downgrade HDCP-protected signals.

Q: Will the HDBOOST4K pass audio, including surround sound formats?

A: Yes. The HDBOOST4K passes audio up to 7.1 surround sound through the HDMI signal chain. No separate audio extraction is needed for deployments with AVRs or professional audio processors.

Q: Can the HDBOOST4K be used in an outdoor or high-temperature equipment room?

A: No. The operating temperature range is 0°C to 35°C (32°F to 95°F), which covers standard conditioned indoor spaces only. It is not rated for outdoor use or unconditioned equipment rooms that may exceed 35°C.

Q: What is the warranty on the HDBOOST4K?

A: The HDBOOST4K carries a 2-year manufacturer warranty.

Ted Perry

The HDBOOST4K is the kind of device that solves a very specific problem cleanly: your HDMI cable run is too long for the resolution you need, and you don't want to rebuild the infrastructure. The 30 ft ceiling at 4K 60Hz is the critical number here — past that point, even premium passive cables start losing signal integrity at full bandwidth, and you'll see dropouts or a blank screen rather than a graceful quality reduction. This repeater re-clocks the signal mid-run and gets you back to a clean handshake.

Technical Highlights:

• Resolution-tiered distance support: 30 ft at 4K 60Hz, 82 ft at 4K 30Hz, 115 ft at 1080p — three distinct operating modes depending on source and display capability. Know your source frame rate before specifying the cable run length.
• HDCP 2.2 pass-through: Required for any deployment where the source is a 4K streaming device, cable box, or 4K Blu-ray player. A repeater that only handles HDCP 1.4 will cause a handshake failure and a black screen on HDCP 2.2-required content — this one passes the full chain.
• USB 5V DC power: At 5.3 oz and powered entirely from USB, installation is a two-minute job. No outlet required at the booster location as long as any USB-A port is within reach — most modern displays provide one.

Deployment Considerations:

• Plan your USB power source before finalizing the install location. The HDBOOST4K has no internal battery and no barrel-jack input — it is USB-only. If the nearest display lacks a powered USB port in standby, you'll need a wall charger at that point.
• The 0°C to 35°C operating range is the real constraint for AV closets or equipment rooms without HVAC. A small rack room in summer can easily exceed 35°C — verify the ambient temperature before placing this device in an uncontrolled space.

The HDBOOST4K is the right call for a permanent conference room install where the display is ceiling-mounted and the source rack is 25–30 ft away — exactly the scenario where a passive cable fails at 4K 60Hz and active fiber is overkill. It's a single-purpose device that does its job without configuration overhead.