NTI UNIMUX-HD4K18GB-4
Expert rating8.4 / 10
- Port Count:
- 4
- Video Standard:
- HDMI 2.0
- Max Resolution:
- 4096x2160 @ 60Hz
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Manufacturer: NTI (Network Technologies Inc) Last updated: September 12, 2026
NTI UNIMUX-HD4K18GB-4 (4-Port Rackmount 4K HDMI 18Gbps KVM Switch / $1158.44) Review
The NTI UNIMUX-HD4K18GB-4 is a 1U rackmount 4-port KVM switch supporting full-bandwidth 18Gbps HDMI 2.0 at 4K@60Hz 4:4:4, with 2 transparent USB 2.0 ports, HDMI audio switching, and RS-232 control, priced at $1158.44.
NTI's UNIMUX-HD4K18GB series is built for server-room rack mounting rather than desktop use, and the 18Gbps HDMI 2.0 bandwidth is the headline: full 4K@60Hz with 4:4:4 chroma and HDR pass-through, rather than the 4K@30Hz many rackmount switches settle for. The 4-port entry model is the smallest in a family that scales up to 32 ports on identical firmware and control scheme, so a small deployment can grow into a larger one without retraining staff. Versus the NTI UNIMUX-DVI-8HD already in this catalog — that's DVI-based and 8-port at a lower per-port bandwidth, useful for legacy DVI server infrastructure. Versus the NTI UNIMUX-HD4K18GB-8 — same series, double the ports, for larger racks.
Full 18Gbps HDMI 2.0 Bandwidth
NTI's UNIMUX-HD4K18GB series is built for server-room rack mounting rather than desktop use, and the 18Gbps HDMI 2.0 bandwidth is the headline: full 4K@60Hz with 4:4:4 chroma and HDR pass-through, rather than the 4K@30Hz many rackmount switches settle for.
A Family That Scales From 4 to 32 Ports
The 4-port entry model is the smallest in a family that scales up to 32 ports on identical firmware and control scheme, so a small deployment can grow into a larger one without retraining staff.
Comparison to Alternatives
Versus the NTI UNIMUX-DVI-8HD already in this catalog — that's DVI-based and 8-port at a lower per-port bandwidth, useful for legacy DVI server infrastructure. Versus the NTI UNIMUX-HD4K18GB-8 — same series, double the ports, for larger racks.
Specifications
Design
| Port Count | 4 |
|---|---|
| Switching Method | Front-panel buttons, keyboard commands, OSD, RS232 |
Topology
| Computers Supported | 4 computers |
|---|---|
| Displays Per Computer | 1 displays |
| KVM Segment | Rack |
Video & Features
| Video Standard | HDMI |
|---|---|
| Max Resolution | 4096x2160 @ 60Hz |
| USB Hub Ports | 2 |
| Audio Support | Yes |
Video interface
| Video Connector | HDMI |
|---|---|
| Video Interface Version | HDMI 2.0 |
Per display capability
| Max Refresh At Max Resolution | 60 Hz |
|---|---|
| Max Refresh At 4K | 60 Hz |
Display continuity
| HDCP Version | 2.2 |
|---|---|
| HDR Passthrough | Yes |
USB peripheral switching
| USB Switching Speed | USB 2.0 |
|---|---|
| Shared USB Ports | 2 ports |
| Dedicated HID Ports | 2 ports |
Switching control
| Button Switching | Yes |
|---|---|
| Hotkey Switching | Yes |
| Serial Or Network Control | RS232 |
Physical and power
| Rack Mountable | Yes |
|---|---|
| External Power Required | No |
In the box and price
| Price | 1158.44 USD |
|---|
| Brand | NTI |
|---|---|
| Model | UNIMUX-HD4K18GB-4 |
| Rack Height | 1U |
| USB-C Power Delivery | No |
| Spec Score | 5.9 |
| Source URL | https://www.networktechinc.com/pdf/4k-hdmi2-usb-kvm-switch.pdf |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8.4 / 10
The entry point into NTI's full-bandwidth 4K HDMI rack switch family, a strong pick for a small server room that may grow.
Best for
- Small server racks needing full 4K@60Hz 4:4:4 HDMI switching
- Deployments that may later scale into the 8/16/24/32-port siblings
- IT teams wanting RS-232/network control alongside front-panel buttons
Not for
- Desktop use (this is a 1U rackmount unit)
- Larger racks needing 8+ ports from the start
- Legacy DVI-only server infrastructure (see the UNIMUX-DVI-8HD)
FAQs
What are the key specifications of the NTI UNIMUX-HD4K18GB-4 (4-Port Rackmount 4K HDMI 18Gbps KVM Switch / $1158.44)?
The NTI UNIMUX-HD4K18GB-4 (4-Port Rackmount 4K HDMI 18Gbps KVM Switch / $1158.44) is a KVM switch from NTI (Network Technologies Inc). Key specs: Port Count 4, Switching Method Front-panel pushbutton + RS-232/network control, Video Standard HDMI 2.0 (18Gbps), Max Resolution 4K@60Hz 4:4:4, USB Hub Ports 2.
Who is the NTI UNIMUX-HD4K18GB-4 (4-Port Rackmount 4K HDMI 18Gbps KVM Switch / $1158.44) best suited to?
It suits small server racks needing full 4k@60hz 4:4:4 hdmi switching, deployments that may later scale into the 8/16/24/32-port siblings, it teams wanting rs-232/network control alongside front-panel buttons.
What are the drawbacks of the NTI UNIMUX-HD4K18GB-4 (4-Port Rackmount 4K HDMI 18Gbps KVM Switch / $1158.44)?
It is a poor fit for desktop use (this is a 1u rackmount unit), larger racks needing 8+ ports from the start, legacy dvi-only server infrastructure (see the unimux-dvi-8hd).
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