Description
ST-NSPC24AP 48Gbps 2x4 HDMI Splitter is a professional HDMI 2.1 splitter with 2 HDMI inputs and 4 HDMI outputs supporting resolutions up to 8K@60Hz 4:2:0 12-bit. It features HDR10+, Dolby Vision, HDCP 2.3, EDID management, audio de-embedding, 8K to 4K downscaling, HDR to SDR conversion, RS-232 and API control, making it ideal for professional AV installations.
The ST-NSPC24AP 48Gbps 2x4 HDMI Splitter supports HDMI 2.1, HDCP 2.3, HDR10+, Dolby Vision, and advanced EDID management for reliable 8K AV distribution.
Designed for professional AV installations, the ST-NSPC24AP 48Gbps 2x4 HDMI Splitter provides 8K to 4K downscaling, HDR to SDR conversion, audio de-embedding, and RS-232/API control.
The ST-NSPC24AP 48Gbps 2x4 HDMI Splitter is designed for commercial AV, conference rooms, digital signage, and professional multimedia installations.
Features
☆ HDCP 2.3 compliant
☆ Support 48Gbps video bandwidth
☆ Support resolution up to 8K@60Hz 4:2:0 12bit, 8K@30Hz 4:4:4 12bit, 4K@120Hz 4:4:4 12bit, as specified in HDMI 2.1
☆ Support HDR, HDR10, HDR10+, Dolby Vision, ALLM/VRR pass-through
☆ Support 8K→4K/2K downscaling on each output for legacy display
☆ Support HDR to SDR conversion on each output for legacy display
☆ Support digital or analog audio de-embedding, and analog audio outputs with gain control
☆ Support auto switching and manual switching
☆ Support input switching via front panel buttons, IR remote, API commands
☆ Built-in equalizer, retiming and driver
☆ Advanced EDID management
☆ Controlled by front panel buttons, IR remote and API commands
The ST-NSPC24AP 48Gbps 2x4 HDMI Splitter delivers reliable 8K HDMI distribution with advanced EDID management and audio de-embedding.
Package Contents
① 1x 48Gbps 2x4 HDMI Splitter
② 1x 12V/1A Multinational Locking Power Supply
③ 1x IR Remote
④ 1x IR Wideband Receiver (1.5m)
⑤ 1x 3pin-3.5mm Phoenix Connector
⑥ 1x 5pin-3.5mm Phoenix Connector
⑦ 2x Mounting Ear
⑧ 4x Machine Screw (KM3*6)
⑨ 1x User Manual
With HDMI 2.1 compliance, the ST-NSPC24AP 48Gbps 2x4 HDMI Splitter supports high-performance 8K video and immersive audio formats.
Specifications
| Technical | |
| Video Bandwidth | 48Gbps |
| Video Resolution | Up to 8K@60Hz 4:2:0 12bit, 8K@30Hz 4:4:4 12bit, 4K@120Hz 4:4:4 12bit |
| HDMI Compliance | HDMI 2.1 |
| HDCP Compliance | HDCP 2.3 |
| Color Space | RGB, YCbCr 4:4:4, YCbCr 4:2:2, YCbCr 4:2:0 |
| Color Depth | 8/10/12-bit |
| HDR Support | HDR, HDR10, HDR10+, Dolby Vision, HLG |
| Audio Formats (HDMI) | LPCM, Dolby Digital/Plus/EX, Dolby True HD, Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD Master Audio, DSD |
| Audio Formats (De-embedded) | Optical: Up to LPCM/Dolby/DTS 5.1CH L/R Out: LPCM 2CH |
| Output Level (Maximum) | 8.2dBu (2Vrms) @ balanced audio 2.2dBu (1Vrms) @ unbalanced audio |
| Output Impedance | 300 Ohm |
| Frequency Response | (+0.5dB, -1dB) 20Hz to 20kHz |
| Audio Output Sync Delay | 0 to 2.2ms |
| Audio S/N Ratio | 99dB @ 2Vrms, 1kHz, A-weighted |
| Audio THD+N | <0.2% @ 0dBV, 1kHz |
| IR Frequency | Wideband 20K–60KHz |
| IR Level | 12Vp-p |
| Transmission Distance | 3m / 9.8ft over HDMI cable |
| ESD Protection | IEC 61000-4-2: ±8kV (Air-gap discharge), ±4kV (Contact discharge) |
| Connection | |
| Input | 2x IN [HDMI Type A, 19-pin female] |
| Output | 4x OUT [HDMI Type A, 19-pin female] 1x OPTICAL [S/PDIF] 1x L/R [5pin-3.5mm phoenix connector] |
| Control | 1x RS-232 [3pin-3.5mm phoenix connector] 1x IR CTL [3.5mm stereo mini-jack] 1x SERVICE [USB Type-C, firmware upgrade port] |
| Mechanical | |
| Housing | Metal Enclosure |
| Color | Black |
| Dimensions | 220mm [W] × 110mm [D] × 21.5mm [H] |
| Weight | 620g |
| Power Supply | DC 12V/1A |
| Power Consumption (Max) | 6.24W |
| Operating Temperature | 0°C ~ 40°C / 32°F ~ 104°F |
| Storage Temperature | -20°C ~ 60°C / -4°F ~ 140°F |
| Operating Humidity | 20%~80% relative humidity, non-condensing |
| Storage Humidity | 10%~90% relative humidity, non-condensing |
Operation Controls and Functions
Front Panel
| No. | Name | Function Description |
|---|---|---|
| 1 | POWER Button | Press to power on; press and hold to enter standby mode. |
| 2 | POWER LED | Green ON: The device is powered on. Red ON: The device is in standby mode. |
| 3 | SELECT Button | Press to select input source IN 1/IN 2 circularly. |
| 4 | IN LED (1~2) | When the IN 1/IN 2 port is selected as an input channel, the corresponding green LED will be on. |
| 5 | OUT LED (1~4) | When the OUT 1/2/3/4 port is connected to an active display device, the corresponding green LED will be on. |
| 6 | EDID DIP Switch | Use the DIP switch to set EDID: DIP_0000: EDID pass-through / Copy from Sink 1 (default) DIP_0001: HDMI 1080p@60Hz, Audio 2CH PCM DIP_0010: HDMI 1080p@60Hz, Audio 5.1CH DTS/DOLBY DIP_0011: HDMI 4K@60Hz 4:4:4, 8-bit, Audio 2ch PCM DIP_0100: HDMI 4K@60Hz 4:4:4, 8-bit, Audio 5.1CH DTS/DOLBY DIP_0101: HDMI 4K@120Hz 4:4:4, 10-bit HDR/DV, Audio 2ch PCM DIP_0110: HDMI 4K@120Hz 4:4:4, 10-bit HDR/DV, Audio 5.1CH DTS/DOLBY DIP_0111: HDMI 4K@120Hz 4:4:4, 12-bit HDR/DV, Audio 2ch PCM DIP_1000: HDMI 4K@120Hz 4:4:4, 12-bit HDR/DV, Audio 5.1CH DTS/DOLBY DIP_1001: HDMI 8K@60Hz 4:2:0, 10-bit HDR/DV, Audio 2ch PCM DIP_1010: HDMI 8K@60Hz 4:2:0, 10-bit HDR/DV, Audio 5.1CH DTS/DOLBY DIP_1011: HDMI 8K@60Hz 4:2:0, 12-bit HDR/DV, Audio 2ch PCM DIP_1100: HDMI 8K@60Hz 4:2:0, 12-bit HDR/DV, Audio 5.1CH DTS/DOLBY DIP_1101: HDMI 8K@60Hz 4:2:0, 12-bit HDR/DV, Audio 2ch PCM – Inc VRR/DSC DIP_1110: HDMI 8K@60Hz 4:2:0, 12-bit HDR/DV, Audio 5.1CH DTS/DOLBY – Inc VRR/DSC DIP_1111: EDID Software if possible or HDMI 1080p@60Hz, Audio 2ch PCM |
| 7 | IR Window | IR input signal receiving window. |
| 8 | SERVICE Port | USB-C port used for firmware update. |
Rear Panel
| No. | Name | Function Description |
|---|---|---|
| 1 | IN (1~2) Port | HDMI signal input ports, connecting to source devices such as PC or PS5 with an HDMI cable. |
| 2 | OUT (1~4) Port | HDMI signal output ports, connecting to display devices such as TV or Monitor with an HDMI cable. |
| 3 | OPTICAL (AUDIO OUT) | Digital audio output port, connecting to an audio device via S/PDIF optical cable. |
| 4 | L/R (AUDIO OUT) | Analog audio output port, supporting balanced audio output (max 2Vrms) and unbalanced audio output (max 1Vrms). Balanced connection: L+, L–, GND, R+, R– Unbalanced connection: L+, GND, R+ |
| 5 | RS-232 | RS-232 serial port, connecting to a PC or control system for API command control. |
| 6 | IR CTL | 12V IR input port, connected with the IR receiver cable. |
| 7 | DC 12V | DC 12V/1A power input port. |
IR Remote
RS-232 / API Control
The product supports API command control via the SERVICE (USB-C) or RS-232 port. Connect to a PC and use a Serial Command tool to send commands.
| Commands | Function | Example | Default |
|---|---|---|---|
| help | Get the list of all commands | help | – |
| get fw version | Get firmware version | get fw version | – |
| set power on/off | Set device power on/off | set power on | on |
| get power | Get device power status | get power | – |
| set reboot | Reboot the device | set reboot | – |
| set reset | Reset to factory defaults | set reset | – |
| get status | Get system status | get status | – |
| set IR on/off | Set IR on/off | set IR on | on |
| set input x | Set input (x=1~2: HDMI input 1~2; x=0: Off) | set input 1 | 1 |
| get input | Get input port | get input | – |
| set autoswitch x | Set auto-switching on/off (HDMI 5V detection) | set autoswitch on | on |
| set output x downscale y | Set output downscaling mode (x=0~4 output; y=0: auto, y=1: bypass, y=2: force 1080p) | set output 0 downscale 0 | 0 |
| set output x display y | Set output display mode (y=0: off, y=1: input video, y=2: AVMUTE, y=3: internal pattern) | set output 0 display 2 | 1 |
| set output x HDCP y | Set output HDCP mode (y=1: follow sink, y=2: follow source, y=3: force 1.4, y=4: force 2.2) | set output 0 HDCP 1 | 1 |
| set analog mute x | Set analog audio mute on/off | set analog mute on | off |
| set analog gain x | Set analog audio gain (x=0dB ~ -79dB) | set analog gain -79dB | 0dB |
| set edid x to y | Set input ports (x=0~2) to EDID profile (y=0~32). See full EDID list in user manual. | set edid 0 to 0 | 0 |
| set baud x | Set RS-232 baud rate (x=1: 4800 to x=6: 115200) | set baud 6 | 115200 |
| set key on/off | Enable/disable front panel keys | set key on | on |
| set generator x y | Set internal signal generator resolution (x=1~15) and pattern (y=1~13) | set generator 1 1 | – |
Service port baud rate: 115200 (fixed). RS-232 port baud rate: configurable 4800–115200. Data bit: 8, Stop bit: 1, Parity: none. Command end mark: <CR><LF>
Choose the ST-NSPC24AP 48Gbps 2x4 HDMI Splitter for dependable HDMI signal distribution in professional AV environments.
Application Example
