8K HDMI Matrix Switch BK-402A with Four Inputs, Two Outputs, eARC Support and Optical Audio Extraction

BK-402A routes up to four HDMI sources to two displays, with independent source selection for each output. The matrix supports 8K video, eARC and separate optical or 3.5 mm stereo audio outputs for flexible home theater and AV connections.

Key Features

• HDMI 2.1 and HDCP 2.3 support with 40 Gbps video bandwidth.
• Supported video modes include 8K at 60 Hz, 8K at 30 Hz and 4K at 120 Hz; source, display and cable capabilities affect the available mode.
• VRR, ALLM and FVA support, with HDR10+, Dolby Vision and HLG passthrough.
• Downscale 8K to 4K or 2K, and 4K to 2K, for a connected display that requires a lower resolution.
• eARC operates between HDMI Input 1 and Output 1, with supported lossless audio formats including Dolby Atmos and DTS:X.
• Optical and 3.5 mm analog outputs provide separate audio extraction.
• Manage EDID through DIP switches and change sources using front-panel controls or the included IR remote.

Specifications

• Model: BK-402A
• HDMI inputs: four Type-A female ports
• HDMI outputs: two Type-A female ports
• Additional outputs: optical S/PDIF and 3.5 mm stereo
• Optical audio formats: LPCM, Dolby and DTS 5.1
• Analog audio format: LPCM 2.0
• Service connection: Micro-USB update port
• Power adapter input: AC 100–240 V, 50/60 Hz
• Power adapter output: DC 5 V, 2 A
• Maximum stated unit consumption: 2 W
• Dimensions: 200 × 85 × 21 mm; weight: 411 g
• Housing: black metal enclosure
• Operating temperature: 0–40°C; operating humidity: 20–90% RH, non-condensing
• Package includes: matrix switch, remote, power adapter and user manual

The Micro-USB connection is a service update port. Connect compatible HDMI cables and confirm the required video and audio modes across your source and displays.