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Manufacturer: Emerald (Black Box) Last updated: September 12, 2026
Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03) Review
The Emerald EMD4000T is a Black Box Emerald 4K DisplayPort KVM-over-IP transmitter, encoding 4K video and USB for network transport, priced at $2,665.03.
This is the source-side half of Emerald's 4K DisplayPort pair — plan on buying it with the EMD4000R receiver, since the two together (just over $5,200) are what actually gets a 4K workstation extended across a network.
Source-Side 4K Encoding
The EMD4000T sits at the workstation, encoding 4K DisplayPort video, USB peripherals and audio for transport over a standard IP network to its EMD4000R receiver counterpart, letting facilities keep the actual PC in a secured or remote equipment room.
Priced for Serious 4K Deployments
At $2,665.03, this transmitter alone costs more than most complete Cat5 KVM extender kits in this catalog — a reasonable trade for buyers who genuinely need 4K DisplayPort fidelity over an IP-routed network, not for casual extension needs.
Comparison to Alternatives
ATEN's KX9970T (also in this catalog) reaches 5K DisplayPort for a lower price than the EMD4000T, worth comparing directly if your GPU and monitor can use the extra resolution. Adder's ALIF1104T stays at HDMI/1080p-class resolution for well under half the EMD4000T's price.
Specifications
Design
| Port Count | 1 |
|---|
Topology
| Computers Supported | 1 computers |
|---|---|
| Displays Per Computer | 1 displays |
| Video Path Type | KVM over IP |
| KVM Segment | Extender |
Video & Features
| Video Standard | DisplayPort |
|---|---|
| Max Resolution | 4096x2160 @ 60Hz |
| Audio Support | Yes |
Video interface
| Video Connector | DisplayPort |
|---|
Per display capability
| Max Refresh At Max Resolution | 60 Hz |
|---|---|
| Max Refresh At 4K | 60 Hz |
Audio
| Analog Audio Jacks | Yes |
|---|
Physical and power
| External Power Required | Yes |
|---|
In the box and price
| Video Cables Included | 1 cables |
|---|---|
| USB Host Cables Included | 1 cables |
| Price | 2665.03 USD |
| Brand | Emerald (Black Box) |
|---|---|
| Model | EMD4000T |
| Connection Type | KVM-over-IP Transmitter |
| Network Type | Gigabit Ethernet (IP-routed) |
| Source URL | https://www.blackbox.com/en-us/store/product/detail/Emerald-4K-KVM-over-IP-Extender-DisplayPort-Single-Head-V-USB-2-0-Audio/EMD4000?item=EMD4000T |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8 / 10
A capable 4K DisplayPort transmitter for serious network-routed KVM deployments — compare against ATEN's cheaper 5K KX9970T before committing.
Best for
- 4K DisplayPort workstations needing network-routed extension
- Secure equipment rooms keeping PCs away from the desk
- Facilities standardizing on Emerald 4K infrastructure
Not for
- Buyers without a matching EMD4000R receiver
- HDMI or sub-4K resolution needs, where Adder's ALIF1104T is far cheaper
- Casual or single-desk extension needs better served by a Cat5 extender
FAQs
What are the key specifications of the Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03)?
The Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03) is a KVM switch from Emerald (Black Box). Key specs: Connection Type KVM-over-IP Transmitter, Port Count 1 (transmitter node — pairs with EMD4000R), Video Standard DisplayPort, Max Resolution 3840x2160 @ 60Hz (4K), Network Type Gigabit Ethernet (IP-routed).
Who is the Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03) best suited to?
It suits 4k displayport workstations needing network-routed extension, secure equipment rooms keeping pcs away from the desk, facilities standardizing on emerald 4k infrastructure.
What are the drawbacks of the Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03)?
It is a poor fit for buyers without a matching emd4000r receiver, hdmi or sub-4k resolution needs, where adder's alif1104t is far cheaper, casual or single-desk extension needs better served by a cat5 extender.
Compare and read more
- Adder ALIF1104T (HDMI KVM-over-IP Transmitter over 1GbE / $1,201.75) vs Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03)
- Adder AdderView PRO AV4PRO (4-8 Computers / 1-4 Monitors / DVI-VGA / Modular Multi-Head) vs Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03)
- Adder ADDERView PRO (AV4PRO-DVI) (4 Computers / DVI / Secure Desktop KVM / $540.00) vs Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03)
- Adder AdderLink IPEPS (IPEPS) (1 Server / IP-Based Remote KVM over IP / Single-Port Extender) vs Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03)
- Adder ALIF1002P (Network DVI Extender Transmitter & Receiver / $3,051.40) vs Emerald EMD4000T (4K DisplayPort KVM-over-IP Transmitter / $2,665.03)