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48Gbps 8K 2-In 8-Out HDMI Switching Splitter with Independent Downscaling & Audio De-embedding

Select 1 of 2 HDMI Sources and Send It to 8 Screens, with Auto-Scaling Video & Balanced/Digital Audio Breakout

SP-HDMI2X8-8KUPC 813982024120
In stock48Gbps 8K 2-In 8-Out HDMI Switching Splitter with Independent Downscaling & Audio De-embedding – KanexPro SP-HDMI2X8-8K
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Overview

The SP-HDMI2X8-8K eliminates the multi-box problem of chaining a separate switcher into a distribution amplifier by combining two-source HDMI 2.1 switching with eight independently scaled outputs in a single compact enclosure. All eight outputs show the selected source at the same time; to send a different source to each display, use a true matrix switcher. Each output downscales 8K to 4K or 2K and converts HDR to SDR on the fly, enabling mixed-resolution display fleets to receive optimized video without external scalers or EDID workarounds.

Compliant with HDMI 2.1 and HDCP 2.3, the splitter delivers 48Gbps bandwidth supporting 8K@60Hz 4:2:0, 8K@30Hz 4:4:4, and 4K@120Hz 4:4:4 with HDR10, HDR10+, Dolby Vision, HLG, ALLM, and VRR pass-through. Audio de-embedding provides both optical S/PDIF (up to 5.1CH) and balanced/unbalanced analog output with adjustable gain via a 5-pin phoenix connector. A built-in signal generator with 15 resolutions and 13 test patterns simplifies commissioning and cable verification. Control via front panel, IR remote, or RS-232 ASCII commands.

Key features
  • Selects 1 of 2 HDMI 2.1 sources and sends it to all 8 displays at once, at up to 8K@60Hz 4:2:0 12-bit with 48Gbps bandwidth and HDCP 2.3 compliance
  • Independent 8K to 4K/2K downscaling on each output — auto, bypass, or force 1080p per display for mixed-resolution fleets
  • Per-output HDR to SDR conversion preserves accurate imagery on non-HDR displays without manual EDID intervention
  • HDR10, HDR10+, Dolby Vision, HLG, ALLM, and VRR pass-through for gaming and cinematic content on compatible screens
  • Audio de-embedding via optical S/PDIF (LPCM/Dolby/DTS 5.1CH) and balanced/unbalanced analog (LPCM 2CH) with adjustable gain (0 dB to -79 dB)
  • Built-in HDMI signal generator with 15 resolutions (8K to 480p) and 13 test patterns for on-site commissioning and cable diagnostics
  • Advanced EDID management with 16 hardware DIP switch presets and 33 software presets including 2 user-defined slots and pass-through mode
  • Control via front panel buttons, IR remote, and RS-232 ASCII commands (3-pin phoenix, configurable 4800–115200 bps) — USB-C service port for firmware updates
Technical
HDMI Compliance HDMI 2.1
HDCP Compliance HDCP 2.3
Video Bandwidth 48Gbps
Video Resolution Up to 8K@60Hz 4:2:0 12-bit, 8K@30Hz 4:4:4 12-bit, 4K@120Hz 4:4:4 12-bit
Color Depth 8-bit, 10-bit, 12-bit
Color Space RGB, YCbCr 4:4:4 / 4:2:2, YCbCr 4:2:0
HDR Formats HDR, HDR10, HDR10+, Dolby Vision, HLG
Gaming Features ALLM, VRR
HDMI Audio (Pass-through) LPCM, Dolby Digital/Plus/EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD Master Audio, DSD
Audio De-embed (Optical) LPCM / Dolby / DTS up to 5.1CH
Audio De-embed (Analog) LPCM 2CH — balanced (8.2 dBu max) or unbalanced (2.2 dBu max)
Analog Audio S/N 99 dB @ 2 Vrms, 1 kHz, A-weighted
Analog Audio THD+N <0.2% @ 0 dBV, 1 kHz
Analog Audio Impedance 300 Ohm
Analog Audio Frequency Response 20 Hz – 20 kHz
Analog Audio Gain Adjustable 0 dB to -79 dB
IR Level / Frequency 12 Vp-p / Wideband 20K–60 kHz
Transmission Distance 3m / 9.8 ft over HDMI cable
ESD Protection IEC 61000-4-2: ±8kV (air-gap) & ±4kV (contact)
Connection
Input 2× HDMI Type A [19-pin female]
Output 8× HDMI Type A [19-pin female], 1× Optical S/PDIF, 1× L/R Analog [5-pin phoenix connector]
Control 1× RS-232 [3-pin phoenix connector], 1× IR CTL [3.5mm stereo mini-jack], 1× SERVICE [USB Type-C]
Mechanical
Housing Metal Enclosure, Black
Dimensions 320mm (W) × 100mm (D) × 21.5mm (H)
Weight 810 g
Power Supply DC 12V / 2.5A (multinational locking adapter)
Power Consumption 9.6W (max)
Operating Temp 32–104°F / 0–40°C
Storage Temp -4–140°F / -20–60°C
Operating Humidity 20–80% RH (non-condensing)
Storage Humidity 10–90% RH (non-condensing)

1× 48Gbps 2×8 HDMI Splitter • 1× 12V/2.5A Multinational Locking Power Supply • 1× IR Remote • 1× IR Wideband Receiver (1.5m) • 1× 3-pin Phoenix Connector • 1× 5-pin Phoenix Connector • 2× Mounting Ears • 4× Machine Screws (KM3×6) • 1× User Manual

48Gbps 8K 2-In 8-Out HDMI Switching Splitter with Independent Downscaling & Audio De-embedding panel drawing
48Gbps 8K 2-In 8-Out HDMI Switching Splitter with Independent Downscaling & Audio De-embedding system diagram
48Gbps 8K 2-In 8-Out HDMI Switching Splitter with Independent Downscaling & Audio De-embedding applications
ManualInstallation and operation
Spec sheetFull specification
Sales sheetFor bid packages
What is the maximum resolution, chroma, and refresh rate the SP-HDMI2X8-8K supports, and what HDMI/HDCP version does it use?
The splitter is HDMI 2.1 and HDCP 2.3 compliant, supporting up to 8K@60Hz at 4:2:0 12-bit, 8K@30Hz at 4:4:4 12-bit, and 4K@120Hz at 4:4:4 12-bit, at up to 48Gbps video bandwidth.
What is included in the box?
The package includes the 48Gbps 2x8 HDMI splitter, a 12V/2.5A multinational locking power supply, an IR remote, a 1.5m IR wideband receiver, a 3-pin Phoenix connector, a 5-pin Phoenix connector, two mounting ears, four KM3x6 machine screws, and a user manual.
What HDR formats and gaming features pass through the splitter?
It passes HDR, HDR10, HDR10+, Dolby Vision, and HLG, along with ALLM and VRR gaming features.
What is the RS-232/API connection and command format for control integration?
Connect the SERVICE USB-C port (fixed at 115200 bps) or the RS-232 3-pin Phoenix port (configurable 4800-115200 bps, default 115200) to a PC serial terminal, using 8 data bits, 1 stop bit, no parity, and a <CR><LF> end mark. Send ? to list all available commands.
What API commands select the input and force downscaling on an output?
Use set input x (x = 1 or 2) to select which HDMI input is sent to all eight outputs, and set output x downscale y (x = 0-8, y: 0 = auto, 1 = bypass, 2 = force 1080p) to control per-output downscaling.
What are the physical dimensions and weight for rack or shelf placement?
The unit measures 12.60 in (W) x 3.94 in (D) x 0.85 in (H) (320mm x 100mm x 21.5mm) and weighs 1.79 lbs (810g), with included mounting ears for rack or surface installation.
No video appears on one or more displays. What should I check?
Confirm certified 48Gbps HDMI Ultra High Speed cables no longer than 3m are used, try setting the EDID to match the display's native resolution, and if displays have mixed resolutions, set downscaling to auto with set output 0 downscale 0.
There is no audio from the optical or analog output. What should I check?
Select an EDID preset that includes audio (a preset with 5.1CH DTS/DOLBY for optical, or any preset for analog LPCM 2CH), confirm analog audio is not muted with set analog mute off, confirm gain is at 0dB with set analog gain 0dB, and verify the 5-pin Phoenix wiring matches L+, L-, GND, R+, R- for b
What deployment scenarios suit the SP-HDMI2X8-8K?
It fits professional installs that switch between two 8K-capable sources and send the selected one to all eight displays at once, with independent per-output downscaling and HDR-to-SDR conversion, such as sports bars, command centers, or video walls mixing 8K and legacy displays. To show a different
How does independent per-output downscaling benefit mixed-display rooms?
Each of the 8 outputs can independently downscale an 8K source to 4K or force 1080p, so a single source feeds a mix of 8K, 4K, and legacy displays across an eight-screen fleet without external scalers.
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