OREI BK-4927 Review: 4K 120Hz Gaming With an Older AV Receiver
The OREI BK-4927 combines a four-input HDMI switch with high-bandwidth video passthrough and HDMI, optical and analog audio extraction. It is designed for shoppers who want to connect modern consoles and players to a 4K 120Hz television while continuing to use an older receiver that lacks eARC. Its HDMI audio-only output supports lossless surround formats, while optical and 3.5mm outputs provide broader compatibility with legacy audio equipment.
Video summary
Tech Steve connected a PS5, Xbox and Blu-ray player to the BK-4927 and routed its primary HDMI output to a television. The PS5 reported HDR and refresh rates up to 120Hz at the demonstrated resolutions, while the Xbox reported 4K and 1440p at 120Hz, variable refresh rate and Dolby Vision gaming. Switching among the three sources worked from the included remote. An HDMI-input audio system, powered speakers and the television speakers were also demonstrated through the available audio outputs. A displayed input-lag reading remained 12.8 milliseconds both with a direct television connection and with the BK-4927 in the demonstrated signal path. In a separate PC demonstration, the connected display continued to report approximately 4K at 143.86Hz with 10-bit RGB and HDR through the switch.
Tech Steve Takeaway
The BK-4927 is a practical way to preserve high-refresh-rate video while sending audio separately to an older HDMI receiver, optical audio system or powered stereo speakers. It is especially useful for a multi-console setup, but owners of eARC-only soundbars should choose a device specifically designed for that connection instead.
Gaming compatibility
The documented 48Gbps FRL connection supports 4K at 120Hz, making the BK-4927 suitable for current-generation console signal paths. PS5 and Xbox demonstrations retained their reported 120Hz modes, and the Xbox and PS5 menus showed variable-refresh-rate capability in the tested setup. The displayed lag measurement was 12.8 milliseconds both before and after inserting the switch, although this was a system-level reading rather than a dedicated measurement of the adapter alone. Official model-level support for optional HDMI features such as VRR and ALLM is not specified.
Signal compatibility
The adapter does not create frames or apply motion processing. Its role is to preserve the source device's high-refresh-rate signal, with OREI officially documenting up to 4K at 120Hz and 8K at 60Hz under the listed color-format limits.
Audio support
The dedicated HDMI audio-only output is the strongest audio option because it supports LPCM up to 7.1 channels, Dolby TrueHD, Dolby Atmos, DTS-HD Master Audio and DTS:X. Optical is officially limited to LPCM 2.0, Dolby Digital, Dolby Digital Plus and DTS, while the 3.5mm output handles LPCM 2.0 stereo. The unit does not decode or downmix incompatible multichannel formats, so the source format and selectable audio EDID must match the connected equipment.
Compatibility and features
Sources can be selected automatically, with front-panel controls and an included remote available for manual switching. The remote provides direct access to all four HDMI inputs, while front-panel indicators show the active input and operating status. Compatible HDMI-CEC commands can support selected source, input and volume functions.
What we like
- Passes officially documented signals up to 4K 120Hz or 8K 60Hz under the stated color-format limits
- Four HDMI inputs accommodate multiple consoles, players and streaming devices
- Dedicated HDMI audio output supports lossless Dolby, DTS and multichannel LPCM formats
- Optical and 3.5mm outputs add compatibility with older audio equipment
- Selectable 2.0, 5.1, 7.1 and pass-through audio EDID options help match source output to the audio system
- Includes automatic switching, front-panel controls and a remote
What to consider
- Not intended for eARC-only soundbars such as the Sonos and Bose products identified by OREI
- Optical output cannot carry the full lossless audio format set available over HDMI
- Analog output is limited to two-channel LPCM
- Does not decode or downmix incompatible multichannel audio into stereo
- Only one HDMI output carries video; the second HDMI output is audio-only
- Does not downscale video
- Short HDMI cable runs are recommended for 8K and 4K 120Hz signals
- Official support for VRR, ALLM, QMS and QFT is not specified
Tech Steve verdict
The OREI BK-4927 is best for shoppers who own several modern HDMI sources and want 4K 120Hz video on a newer television without replacing an older HDMI-equipped AV receiver. Its dedicated HDMI audio output preserves lossless surround formats, while optical and analog outputs expand compatibility with legacy systems, powered speakers and stereo headphones. The main tradeoffs are that optical cannot carry the complete lossless HDMI audio format set, analog is stereo only, and the device cannot downmix incompatible multichannel audio or downscale video. It also has only one video-bearing HDMI output, and OREI does not recommend it for eARC-only soundbars such as certain Sonos and Bose models. For an older receiver with a conventional HDMI input, however, it offers an effective combination of high-bandwidth switching and flexible audio extraction.
Exclusive technology
48Gbps FRL
Provides the HDMI bandwidth needed to pass signals as high as 8K at 60Hz or 4K at 120Hz under the color-format limits documented by OREI.
TV ARC/eARC Audio Extraction
Receives return audio through the television connection and routes it to the separate HDMI audio-only output for a receiver or other compatible audio device.
Selectable Audio EDID
Front-panel controls provide 2.0-channel, 5.1-channel, 7.1-channel and pass-through audio EDID choices to match the connected audio system.
Automatic HDMI Input Switching
Can automatically select a newly connected or activated source, with manual selection also available through the front panel or included remote.
CEC Control
Supports compatible HDMI-CEC commands, including certain source, input and volume-control functions through a television remote.
Specifications
Audio
Connectivity
Design & Installation
General
Picture
Specifications
Express your opinion
Share your experience, questions or buying advice with the Tech Steve community.
Log in or create a free account to share your opinion and star rating.
Be the first to rate this product.