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2x4 8K 48Gbps HDMI 2.1 Distribution Amplifier with Input Switching & Audio De-Embedding

VLSP-2x48KA

  • Dual HDMI inputs with auto/manual switching to 4 simultaneous HDMI outputs at full 48Gbps

  • Per-output 8K to 4K/2K downscaling and HDR-to-SDR conversion for mixed-display environments

  • Audio de-embedding to optical S/PDIF and balanced/unbalanced analog L/R with gain control

  • Full HDCP 2.3 and HDMI 2.1 compliance: 8K@60Hz, 4K@120Hz, HDR10, HDR10+, Dolby Vision

Where to Buy
Where to Buy

Product Description

The VLSP-2x48KA is a professional-grade 2-input, 4-output HDMI 2.1 distribution amplifier delivering full 48Gbps bandwidth across all four outputs simultaneously. It accepts two HDMI 2.1 sources and distributes the active input to four displays at resolutions up to 8K@60Hz 4:2:0 12-bit, 8K@30Hz 4:4:4 12-bit, and 4K@120Hz 4:4:4 12-bit, with active signal regeneration ensuring identical signal quality at every output.

Each of the four HDMI outputs independently supports 8K→4K/2K downscaling and HDR-to-SDR conversion, allowing a single 8K HDR source to simultaneously feed native 8K displays, legacy 4K panels, and 1080p projectors without external processing. Input switching between the two HDMI sources operates in auto or manual mode, selectable via front panel buttons, IR remote, or RS-232 API commands, with advanced EDID management and a built-in signal generator rounding out the feature set.

Audio de-embedding outputs the active source's audio simultaneously on two paths: a digital optical S/PDIF output (LPCM/Dolby/DTS up to 5.1CH) and a balanced/unbalanced analog L/R output via 5-pin 3.5mm Phoenix connector (LPCM 2CH) with adjustable gain — feeding displays, a room audio system, and a recording path from a single unit. Full HDMI audio passthrough is maintained on all four HDMI outputs, including Dolby Atmos, Dolby TrueHD, and DTS-HD Master Audio.

Key Features

  • HDMI 2.1 compliant — 48Gbps bandwidth, 8K@60Hz 4:2:0 12-bit / 8K@30Hz 4:4:4 12-bit / 4K@120Hz 4:4:4 12-bit

  • HDCP 2.3 compliant; supports HDR10, HDR10+, Dolby Vision, HLG passthrough

  • 2 HDMI inputs with auto and manual input switching — selectable from front panel, IR remote, or RS-232 API

  • 4 HDMI outputs at full 48Gbps — active signal regeneration on every output port

  • Per-output independent 8K→4K/2K downscaling for legacy display compatibility

  • Per-output independent HDR-to-SDR conversion for SDR display compatibility

  • Audio de-embedding to optical S/PDIF (LPCM/Dolby/DTS 5.1CH) and analog L/R (LPCM 2CH) with gain adjustment

  • Supported HDMI audio: LPCM, Dolby Digital/Plus/EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-EX, DTS-HD Master Audio, DSD

  • Built-in EDID management for reliable source/display handshaking

  • Built-in HDMI signal generator for connection diagnostics

  • Color depth: 8/10/12-bit; color spaces: RGB, YCbCr 4:4:4, 4:2:2, 4:2:0

  • IR wideband receiver input (20K–60KHz) with included 1.5m receiver cable

  • RS-232 API control via 3-pin 3.5mm Phoenix connector

  • USB-C service port for firmware upgrade

  • ESD protection: IEC 61000-4-2 ±8kV air-gap, ±4kV contact discharge

  • Compact form factor: 220 × 110 × 21.5mm; rack-mountable with included ears

  • Power: DC 12V/1A — 6.24W max consumption

Downloads

VLSP-2x48KA DATA SHEET (PDF)
VLSP-2x48KA DATA SHEET (PDF)
VLSP-2x48KA USER MANUAL (PDF)
VLSP-2x48KA USER MANUAL (PDF)

Ideal Applications

Mixed-Resolution Display Environments — Corporate AV & Boardrooms

The VLSP-2x48KA is purpose-built for installations combining displays of different generations in the same room. A single 8K or 4K@120Hz source simultaneously feeds native 8K displays, 4K panels, and legacy 1080p projectors — each output independently configured for the correct resolution and HDR/SDR format. The dual-input auto-switching capability allows a primary PC source and a backup laptop to be connected simultaneously, with seamless handoff if the active source disconnects. This removes the need for a separate switcher in presentation environments and eliminates the manual reconnection delays that disrupt executive-level meetings and board presentations.

Higher Education — Lecture Halls & Multi-Screen Classrooms

University lecture halls and multi-screen classrooms regularly combine a projection screen, confidence monitor, overflow display, and a lecture capture input in a single signal chain. The VLSP-2x48KA distributes the instructor's source to all four outputs at appropriate resolutions — downscaling from 4K to 1080p on the capture input automatically — while extracting audio for the room sound system via the analog L/R output. The second HDMI input enables a hot-swap between a room-installed PC and a guest laptop, with auto-switching eliminating the need for manual source selection during class transitions.

Digital Signage & Retail — Multi-Screen Content Distribution

Retail and hospitality installations often combine large-format 8K flagship displays with smaller 4K secondary screens and legacy 1080p monitors in a single zone. The VLSP-2x48KA's per-output downscaling delivers native content to each display tier from a single source, eliminating per-display media players. The audio de-embedding output simultaneously feeds background music or in-store messaging to the zone amplifier from the same HDMI feed, simplifying the signal chain and reducing rack space requirements.

Broadcast & Live Production — Multi-Monitor Preview & Confidence Monitoring

In broadcast control rooms and live event production environments, a single program feed must be simultaneously distributed to the director's monitor, talent confidence monitors, technical preview displays, and a waveform or vectorscope input at different resolutions. The VLSP-2x48KA handles 8K or 4K@120Hz program content, downscales per-output for each monitoring destination, and de-embeds program audio to the optical output for a separate audio monitoring path — all from a single rack unit without an external audio extractor or scaler in the chain.

Esports & Gaming — High-Frame-Rate Multi-Display Setups

Esports facilities and advanced gaming installations require 4K@120Hz content from PlayStation 5, Xbox Series X, or high-end gaming PCs to be simultaneously distributed to competition monitors, spectator screens, and streaming capture cards — often at different resolutions. The VLSP-2x48KA preserves full 48Gbps bandwidth with 4K@120Hz 4:4:4 12-bit on all outputs capable of receiving it, while downscaling to 1080p for capture cards or legacy spectator displays on a per-output basis. Audio de-embedding simultaneously feeds the game audio to a streaming audio mixer without a separate extractor.

Specifications

Technical
HDMI ComplianceHDMI 2.1
HDCP ComplianceHDCP 2.3
Video Bandwidth48Gbps
Video ResolutionUp to 8K@60Hz 4:2:0 12-bit; 8K@30Hz 4:4:4 12-bit; 4K@120Hz 4:4:4 12-bit
Color Depth8-bit / 10-bit / 12-bit
Color SpaceRGB, YCbCr 4:4:4, YCbCr 4:2:2, YCbCr 4:2:0
HDR SupportHDR, HDR10, HDR10+, Dolby Vision, HLG
HDMI Audio (Input/Output)LPCM, Dolby Digital / Plus / EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD Master Audio, DSD
De-Embedded Audio — OpticalUp to LPCM / Dolby / DTS 5.1CH
De-Embedded Audio — Analog L/RLPCM 2CH
Audio Parameters
Output Impedance300 Ohm
Output Level (Maximum)8.2dBu (2Vrms) balanced; 2.2dBu (1Vrms) unbalanced
Frequency Response20Hz – 20kHz (+0.5dB / −1dB)
Audio Output Sync Delay0 – 2.2ms
Audio S/N Ratio99dB @ 2Vrms, 1kHz, A-weighted
Audio THD+N<0.2% @ 0dBV, 1kHz
IR Level12Vp-p
IR FrequencyWideband 20K–60KHz
HDMI Transmission Distance3m / 9.8ft over HDMI cable
ESD ProtectionIEC 61000-4-2: ±8kV (Air-gap discharge), ±4kV (Contact discharge)
Connections
HDMI Inputs2× IN [HDMI Type A, 19-pin female]
HDMI Outputs4× OUT [HDMI Type A, 19-pin female]
Digital Audio Output1× OPTICAL [S/PDIF]
Analog Audio Output1× L/R [5-pin 3.5mm Phoenix connector]
Control1× RS-232 [3-pin 3.5mm Phoenix connector]; 1× IR CTL [3.5mm stereo mini-jack]; 1× SERVICE [USB Type-C, firmware upgrade]
Mechanical
HousingMetal Enclosure
ColorBlack
Dimensions220mm (W) × 110mm (D) × 21.5mm (H)
Weight620g
Power SupplyDC 12V / 1A (Multinational Locking, included)
Power Consumption6.24W (Max)
Operating Temperature0°C – 40°C / 32°F – 104°F
Storage Temperature−20°C – 60°C / −4°F – 140°F
Operating Humidity20% – 80% relative humidity, non-condensing
Storage Humidity10% – 90% relative humidity, non-condensing

What’s in the Box

  • 1× VLSP-2x48KA 2x4 8K 48Gbps HDMI 2.1 Distribution Amplifier

  • 1× IR Remote

  • 1× 3-pin 3.5mm Phoenix Connector (RS-232)

  • 1× 5-pin 3.5mm Phoenix Connector (Analog Audio L/R)

  • 1× IR Wideband Receiver (1.5m)

  • 1× 12V/1A Multinational Locking Power Supply

  • 2× Mounting Ears

  • 4× Machine Screws (KM3×6)

  • 1× User Manual

Frequently Asked Questions

What resolutions does the VLSP-2x48KA support on its HDMI outputs?

The VLSP-2x48KA supports all HDMI 2.1 resolutions at full 48Gbps bandwidth: up to 8K@60Hz 4:2:0 12-bit, 8K@30Hz 4:4:4 12-bit, and 4K@120Hz 4:4:4 12-bit on each of its four outputs. These are pass-through resolutions from the connected source. When per-output downscaling is enabled, individual outputs can be independently reduced to 4K or 2K for compatibility with legacy displays without affecting the other outputs.

Can each output be set to a different resolution or HDR format independently?

Yes. The VLSP-2x48KA supports independent per-output configuration. Each of the four HDMI outputs can independently downscale from 8K to 4K or 2K, and independently convert HDR to SDR. This means a single 8K HDR source can simultaneously drive a native 8K display, a 4K HDR panel, a 4K SDR monitor, and a 1080p projector — all from the same unit with no external scalers required.

How does input switching work between the two HDMI inputs?

The VLSP-2x48KA supports both auto-switching and manual input selection. In auto mode, the unit detects which input has an active HDMI signal and routes it to all four outputs automatically — if the active source disconnects, it switches to the other input without user intervention. Manual switching is available via the front panel buttons, included IR remote, or RS-232 API commands, giving integrators full programmatic control over source selection.

What audio outputs does the VLSP-2x48KA provide?

The unit de-embeds audio from the active HDMI input and outputs it on two separate paths simultaneously: an optical S/PDIF output supporting LPCM, Dolby, and DTS up to 5.1 channels, and a balanced/unbalanced analog L/R output via a 5-pin 3.5mm Phoenix connector carrying LPCM 2-channel audio with adjustable gain. The HDMI outputs continue to carry all original audio formats — including Dolby Atmos, Dolby TrueHD, and DTS-HD Master Audio — to any connected display or AVR.

Does the VLSP-2x48KA support HDCP 2.3 on all outputs?

Yes. The VLSP-2x48KA is fully HDCP 2.3 compliant across all four HDMI outputs, enabling distribution of protected 4K and 8K content from streaming devices, Ultra HD Blu-ray players, and gaming consoles. Each output manages its own HDCP handshake independently, so a non-HDCP display connected to one output does not affect HDCP operation on the remaining outputs.

What is the built-in HDMI signal generator used for?

The built-in signal generator allows technicians to inject a test pattern into the signal chain without requiring a connected source. This makes it straightforward to verify HDMI cable integrity, display compatibility, and output configuration during initial commissioning or when troubleshooting a suspected cable or display fault — without needing to move a source device to the rack.

What control interfaces does the VLSP-2x48KA support?

The VLSP-2x48KA supports three control methods: front panel buttons for direct local operation, an IR remote using the included wideband IR receiver (20K–60KHz, 1.5m cable), and RS-232 API commands via a 3-pin 3.5mm Phoenix connector for integration with VigilLynx™ control systems, AMX, Crestron, Extron, or any third-party RS-232 controller. A USB-C service port is also provided for firmware upgrades.

How does the VLSP-2x48KA compare to the VLSP-22H21?

Both are dual-input HDMI 2.1 distribution amplifiers at 48Gbps, but they serve different use cases. The VLSP-22H21 is a 2-input, 2-output model without audio de-embedding, designed for installations where only two output destinations are needed. The VLSP-2x48KA provides four HDMI outputs, adds per-output independent downscaling (8K→4K/2K) and HDR-to-SDR conversion, and includes full audio de-embedding to optical and analog L/R outputs. Choose the VLSP-2x48KA when the installation requires more outputs, mixed-resolution displays, or simultaneous audio extraction.

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