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Emerald® - 4K and HD KVM over IP Matrix Switching and Extension

Introducing Unified KVM

Emerald® is an award winning KVM matrix switching system that delivers pixel-perfect HD or 4K video over a dedicated or existing IP network. It allows reliable extension and switching of video (DisplayPort or DVI), transparent USB 2.0 and bi-directional analog audio signals across any combination and number of physical and virtual desktops and servers. Easily access both physical and virtual servers with support for VMware® and Microsoft® virtualization solutions, using PCoIP, RemoteFX and RDP 8.1. The Emerald Remote App turns any Windows 10 device into a software KVM receiver - without the need for additional hardware. Emerald delivers superior value, lowering your costs of ownership and saving your IT investments.

Emerald Unified KVM Features

  • Remote Computer and Server Access

    Access and manage an unlimited number of servers, PCs, and virtual machines from any location and share resources such as hardware and licenses across a dedicated KVM network, an existing IP network, or even the internet.

  • 4K over IP KVM Matrix Switching

    High performance, secure extension and switching of 4K60 (DisplayPort 1.2) and HD (DVI) video, transparent USB 2.0 and bidirectional analog audio.

  • Remote BIOS-level Access

    Benefit from BIOS-level access to troubleshoot, reconfigure, reboot and power cycle servers remotely.

  • Remote Virtual Machine Access and VM Sharing

    Provide access to virtual machines, such as Vmware® and Microsoft® over RDP 8.1 or PCoIP (Ultra), to lower IT costs. Let multiple users access simultaneously the same virtual machine.


Emerald Unified KVM Benefits


Futureproof and
Scalable KVM

Start with HD and add 4K at your own pace. Scale a small point-to-point extension up to an enterprise KVM matrix of unlimited endpoints by adding additional receivers/transmitters.


Designed with 24/7/365 critical applications in mind, Emerald 4K and Emerald PE are configurable with redundant network paths via SFP(+) ports (fiber or copper) for fail-safe operation. Supports complete switchover to a backup control room location.


USB Emulation

True USB emulation, supporting USB HID devices, X-Keys, USB push buttons, Wacom® tablets, USB mass storage, and other high-speed USB 2.0 devices.

Remote Access to
Virtual Machines

Enable multiple users to access any number of physical and virtual servers and desktops. Support for VMware® and Microsoft®, using PCoIP Ultra, PCoIP, RDP 8.1, and RemoteFX.


Pixel-perfect 4K
and HD Video

Extend and switch HD and 4K video. Adjust compression in five steps up to pixel-perfect image transmission — every pixel visualized at 60 fps with 10-bit color depth.


KVM Software

Use the Emerald Remote App to turn any Windows 10 device into a software KVM receiver. Connect to multiple transmitters and virtual machines simultaneously and from everywhere.

Emerald Remote App For Microsoft Windows® 10/11

The Emerald Remote App is a new KVM software receiver that enables remote computer access to both physical and virtual machines from any Windows 10 device. The Remote App increases mobility, device access and monitoring on your Emerald System and delivers a full HD video desktop experience up to 40 fps from multiple connections that can be launched simultaneously. This facilitates device management and access to your Emerald KVM network from anywhere you want.

  • Supports HD video up to 1920 x 1200 and provides access to both physical and virtual machines over an IP network or WAN connections
  • Open connections to multiple devices simultaneously
  • Licence-based access authenticated by the Boxilla® KVM Network Manager in real time, ensuring the Emerald administrator has full control (view licence options)

(1) Boxilla KVM Manager is required for demo purposes

Emerald GE PCoIP Ultra Gateway

Emerald® GE is a new unique solution, which leverages cutting-edge PCoIP® Ultra technology to enable users to access the cloud or a virtual machine just as they would a physical system. Because the gateway can be implemented across multiple receivers, users can access virtual machines in a shared model rather than a conventional single-user (point-to-point) model.  With extremely low bandwidth requirements, the system supports secure, high-definition, and highly-responsive remote access over a LAN or WAN.


Industry Applications

Case Studies Featuring Emerald KVM

Emerald KVM Shines at WeFadeToGrey

May 20, 2020, 12:57 PM
Learn how the Emerald KVM system and ControlBridge touch panel optimized workflows for the postproduction company WeFadeToGrey
Title : Emerald KVM Shines at WeFadeToGrey
Company : We Fade To Grey
Company link :


Based in Cologne, Germany, WeFadeToGrey is a privately owned post facility that specializes in color grading of commercials for prestige brands and for feature productions such as Netflix’s How to Sell Drugs Online and movies such as The Operative. The company was founded in 2008 with a focus on the still-new field of processing data from digital cameras. Since then, curiosity, technical competence, and creative ambition have led to steady growth and a strong reputation in the German post-production landscape.


WeFadeToGrey recently undertook a facility and infrastructure upgrade with the goal of implementing state-of-the-art technologies that support the latest formats and enable more efficient and flexible workflows, now and in the future. The company’s primary technical requirements were a high degree of system scalability and support for high-quality video and peripheral control over IP. With interest in virtualizing PCs at some point down the road, WeFadeToGrey also required a solution already capable of supporting that shift.


The team at WeFadeToGrey carried out extensive research into possible KVM solutions for its updated facility and ultimately opted to implement the Black Box Emerald KVM over IP platform.

“WeFadeToGrey is a modern company committed to using best-in-class technologies to support current and future operations,” says Daniel Berkemer, Business Development Manager at Black Box. “The Emerald system delivers state-of-the-art KVM functionality and offers a simple path to virtualized server infrastructure when WeFadeToGrey chooses to go that direction.”

The Emerald system extends and switches pixel-perfect HD, transparent USB 2.0, and bidirectional analog audio signals over the facility’s IP network, connecting users working in offices and color grading suites to servers and computers situated in the facility’s secure, temperature-controlled central device room. Because Emerald is an IP-based system, WeFadeToGrey was able to establish these links with a minimum of cabling — much less than would be required by a system using proprietary connections.

Color grading workstations are equipped with dual HD monitors, with a single mouse and keyboard, and Emerald KVM transmitters and receivers allow users to enjoy the responsiveness of a local machine while working with DaVinci Resolve software and other applications running on the remote systems. 

This model gives colorists access to the software they need from any workstation, eliminating the need to shift desks to complete particular tasks with specific software tools.

Colorists at WeFadeToGrey use the Black Box ControlBridge touch panel at their desktops for convenient configuration and control over KVM, AV, and other systems.


The Black Box Emerald KVM platform and ControlBridge system at WeFadeToGrey give the facility and its team of creatives a modern, future-proof solution for signal extension and switching.

“We were impressed by Black Box and the company’s technology from the start, and now we’ve seen the benefits of working with the Emerald KVM system across our operations,” says Swen Linde, CEO at WeFadeToGrey. “Our colorists and other creatives now work in more comfortable environment with better access to the resources they need to do their work. Emerald will deliver further benefits as we begin to embrace 4K workflows and take advantage of virtualization.”

In addition to reducing noise, heat, and clutter across the work environment, the IP-based KVM platform provides greater flexibility in resource usage. The team at WeFadeToGrey can access valuable compute resources (typically Mac Pro systems) and the applications they need from any work area while maintaining a seamless user experience.

Because the Emerald KVM family already supports 4K, the facility will be able to shift to 4K displays and take on 4K post-production workflows with ease. The new KVM installation also paves the way for WeFadeToGrey to migrate to a virtualized server infrastructure in the future.

With ControlBridge enabling control over multimedia, AV, KVM, and IP-enabled devices, as well as room automation systems, with a touch of a button, swipe of a touch panel, or tap to a tablet or smartphone,  WeFadeToGrey can rapidly configure both signals and room elements to suit the user and application.

The deployment of Emerald and ControlBridge at WeFadeToGrey already has delivered increased efficiency. The company is moving forward in leveraging these technologies to establish leading-edge post-production workflows.

Tags :
  • Broadcast & Media
  • Emerald 4K
Emerald-KVM-Shines-at-WeFadeToGrey Emerald-KVM-Shines-at-WeFadeToGrey
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Emerald Use Cases

Network Application


Application diagram: Emerald IP-based KVM matrix switching application.

Multiple Site Application


Application diagram: Emerald KVM matrix connecting a control room and a backup site.

Resilient KVM Networks


Application diagram: Emerald KVM transmitters and receivers providing redundant network paths in case of failure.

Virtual Machine Connectivity


Application diagram: Remote, high-speed access to virtual machines, supporting Vmware®, Microsoft® and Citrix®.

Emerald Remote App


Application diagram: Emerald Remote App installed on a laptop connected to Emerald Transmitters and a virtual machine via Boxilla.

Emerald Product Comparison

FeatureEmerald 4KEmerald PEEmerald SEEmerald ZeroU TXEmerald Remote App
Max Video Resolution4096 x 2160 at 60Hz (DisplayPort 1.2)1920 x 1200 at 60Hz (DVI)1920 x 1200 at 60Hz
Video QualityPixel perfectVisually losslessHigh quality ~35fps
Dual Network PortsYes, (2) SFP+Yes, (1) SFP, (1) CATxNo, (1) CATx-
Peripheral SupportAll USB 2.0 devicesUSB HID only
VM SupportPCoIP, RDP/RemoteFXRDP/RemoteFXRDP/RemoteFX-RDP/RemoteFX
Bidirectional Analog Stereo Audio(Speaker only)-
System ScalabilityPoint-to-point extension up to unlimited KVM matrix

Emerald Product Portfolio


Emerald Remote App Licenses

The Emerald Remote App turns any Windows 10 device into a software KVM receiver. Choose from multiple licences allowing 1, 5, 10 or 20 connections (Boxilla™ required).


Emerald ZeroU Transmitters

Little bigger than your smartphone, these transmitters consume zero rack space and can be powered over USB. They support up to 1920x1200 resolutions (DVI), USB HID and audio.


Emerald IP Network Switches

Depending on the number of endpoints connected and the video resolution required, you can choose between a variety of different IP Network Switches supporting 1/10/100 Gbit from 12/28/32/48 ports.


Emerald PCoIP Gateway

  • Emerald GE


Emerald SFP Modules

Emerald supports both CATx copper and fiber connections from SFP/SFP+ slots. Choose your SFP module(s) based on the required transmission bandwidth.

Associated Products

While Emerald is a one-of-a-kind solution that opens up the revolutionary new world of Unified KVM, the platform builds upon time-tested KVM technology evolved by Black Box since the early 1990s. Emerald works flawlessly with many popular Black Box product families, including: the DKM proprietary direct-connect KVM system; the Freedom II KM Switch for easy switching just by moving a mouse between screens; the ControlBridge® system for one-touch, multisystem control; and the award-winning Boxilla® KVM Manager.


Freedom II
KM Switch

This 4 or 8 port USB KM Switch allows switching between up to 8 connected PCs by just moving your mouse from one screen to another. Compatible with all Emerald products.


Room Control Automation

Versatile touch-based multisystem room control processor. ControlBridge allows control room operators to switch between sources or whole room setups.

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