OREI 4K @ 120Hz HDMI Over Ethernet Extender Balun (BK-EXB400R-K)
Quick take
This OREI HDBaseT HDMI over Ethernet extender balun is designed to move uncompressed 4K Ultra HD video over a single CAT5e/6/7 cable, targeting 4K@120Hz performance for gaming and responsive home theater. Buyers like how it can replace long, lossy HDMI runs for “next room” and longer horizontal installs, but successful results depend heavily on using a compatible OREI transmitter/receiver pair and good Ethernet cabling.
Pros and cons
Pros
- HDBaseT long-range HDMI extension with support up to 4K@120Hz (and 8K@30Hz) over CAT cable.
- HDMI 2.1 features for gaming and modern TVs, including VRR and ALLM support.
- Bi-directional IR pass-through for remote control from either end.
- RS-232 port plus CEC support for AV-style control and integration.
Cons
- Works only with its matching OREI transmitter and receiver (not interchangeable across brands or even other OREI HDBaseT models).
- Audio can be sensitive to setup, and some users report intermittent audio dropouts, so plan for troubleshooting if your chain is complex.
- Long-distance video reliability depends on Ethernet cable quality and correct HDMI 2.1 cabling.
What buyers think
Buyer-review evidence for this extender is strongly centered on real-world “distance problems.” In setups where long HDMI cables caused degradation, the extender is described as restoring stable picture and enabling high-refresh gaming without noticeable added lag when connected correctly. Install experiences are also a recurring theme, with buyers saying setup is straightforward when using properly certified HDMI 2.1 cables and appropriate Ethernet cabling (some instances of visible signal noise were traced to a bad network cable). Where evidence gets thinner is around audio stability: a few comments point to audio format or intermediate-device behavior, including intermittent audio dropouts. Overall, reviewers appear to associate the best results with using the correct pairing and dialing in cabling quality.
Who this extender is for
- Gamers who need 4K@120Hz across rooms: If your PC or console is far from your TV, this is built for high-bandwidth HDMI extension over CAT cable.
- Home theater installers replacing long HDMI runs: It targets “no compromise” style transmission for home theater and professional AV-style layouts.
- Integrators and multi-device setups: RS-232 plus CEC and IR pass-through make it more suited to control-forward systems than simple HDMI repeaters.
Key features that matter in daily use
4K@120Hz over a single CAT cable, with modern HDMI support
This extender supports HDMI 2.1 and is specified for up to 4K@120Hz, plus 8K@30Hz. It also supports high-resolution color (including 4:4:4), and it’s designed to handle HDR formats such as HDR10+, Dolby Vision, and HLG. For gaming, the unit lists VRR and ALLM support (helpful when your TV and console try to negotiate a low-latency mode).
Long-range positioning (up to 400 ft) and PoC power
For practical installation planning, the product is specified for long runs up to about 400 feet for 4K@120Hz when using CAT5e/6/7 cabling. It also uses Power over Cable (PoC), so you can run power from just one side with a single AC adapter rather than powering both ends.
Bi-directional IR and CEC control
If you mount sources behind a TV, in a rack, or in another room, IR pass-through makes it easier to control devices from the far end. CEC support is listed as well, which can reduce remote juggling in some setups.
RS-232 for control system integration
The included RS-232 port is intended for command and control workflows, which can matter for custom home theater automation or professional environments.
Compatibility and setup caveats to take seriously
- Use the correct OREI pair: This model is designed to work only with its matching OREI transmitter and receiver, and it’s not intended to mix with other OREI HDBaseT models or HDBaseT devices from different brands.
- Cabling quality is part of performance: Multiple buyer experiences point to the Ethernet cable making a difference, especially over longer distances.
- Audio behavior can vary by chain: Some buyers report audio format or intermittent audio issues. If you’re using a complex AVR, eARC, or audio extraction path, expect that you may need to adjust device settings or cabling.
Pros and cons (expanded)
Pros
- Built for high-bandwidth video: Designed to carry 4K@120Hz (and 8K@30Hz) without relying on wireless or compression.
- Feature coverage for modern displays: HDR support plus HDMI 2.1 gaming features like VRR and ALLM.
- Practical control options: Bi-directional IR and CEC are helpful when the source and TV are separated.
- Installation flexibility: PoC reduces power-adapter placement needs.
Cons
- Not cross-compatible: The matching-pair requirement is strict. Buying “similar-looking” OREI HDBaseT units from different model families can lead to incompatibility.
- Audio may need attention: If your setup is sensitive (for example, multiple audio devices in the path), audio dropouts or missing channels can require troubleshooting.
- Distance is real, but so is cabling: Achieving the best range and signal stability depends on using appropriate Ethernet cabling and HDMI 2.1-rated interconnects.
Verdict
The OREI 4K@120Hz HDMI over Ethernet extender balun is a strong fit for buyers who need to run high-refresh 4K gaming and HDR video across longer distances using CAT cabling, especially in room-to-room installs. It stands out for its HDMI 2.1 and gaming feature support, plus bi-directional IR and control options. The biggest decision point is compatibility and setup discipline, make sure you use the correct matching OREI transmitter and receiver and pay attention to Ethernet cable quality.
FAQ
Is the OREI 4K@120Hz HDMI extender compatible with other HDBaseT brands?
It’s intended to work only with its matching OREI transmitter and receiver pair, and it’s not meant to be interchangeable with other HDBaseT devices from different brands.
What resolution and refresh rate can it extend?
It’s specified for up to 4K@120Hz over CAT cabling, with support up to 8K@30Hz as well.
Does it support HDR and gaming features like VRR?
Yes. It lists support for HDR formats (including HDR10+, Dolby Vision, and HLG) and includes HDMI 2.1 gaming support such as VRR and ALLM.
How does remote control work across rooms?
It includes bi-directional IR pass-through, so you can control a source or display from the far end, depending on how your system is set up. CEC support is also listed.
What’s the main reason people run into issues?
The most common practical pitfalls are using an incompatible transmitter/receiver pairing and relying on poor Ethernet cabling for long runs. Some buyers also report audio can be sensitive to how the rest of the audio chain is configured.
Specifications
| Product Title | OREI 4K @ 120Hz HDMI Over Ethernet Extender Balun - HDBaseT UltraHD 8K@30hz CAT6/7 Cable with HDR, CEC & IR Control, RS-232 Up to 400 Ft Power Over Cable Audio Out (BK-EXB400R-K) |
|---|---|
| Category | Electronics > Television & Video > AV Receivers & Amplifiers |
| Brand | OREI |
| Manufacturer | OREI |
| Model Number | BK-EXB400R-K |
| Color | Black |
| Item Weight | 32.52 Ounces |
| Connector Type Used on Cable | Ethernet, HDMI |
| Compatible Devices | DVD Player, Gaming Console, Laptop, Projector |
| Cable Type | HDMI |
| Number of Ports | 2 |
| Power Source | AC adapter |
| UPC | 810162900755 |
| Mfr Part Number | BK-EXB400R-K |
| Item Length | 5.5 Inches |
| Warranty Description | 1 Year Warranty |
| Unit Count | 1.0 Count |
| Built-In Media | Transmitter & Receiver |
| Connector Type | Ethernet, HDMI |
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