Secure KVM Systems

Secure 4x2 Mini-Matrix KVM DP/HDMI 4K60 with Filtered USB

Expert rating8.3 / 10

Port Count:: 4x2
Video Standard:: DisplayPort/HDMI
Max Resolution:: 4K@60Hz

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Manufacturer: Secure KVM Systems Last updated: 2026-09-12

Secure 4x2 Mini-Matrix KVM DP/HDMI 4K60 with Filtered USB Review

Secure SX42PHU-4 4x2 mini matrix filtered USB DisplayPort HDMI 4K60 secure peripheral pass-through classified

The SX42PHU-4 takes the SX42PH-4's dual-monitor matrix and adds filtered USB pass-through, so approved peripherals like signature pads or specialty input devices can travel with the video switch while mass-storage and other risky device classes stay blocked by policy.

Filtered, Not Full, USB Pass-Through

'Filtered' is the operative word: the switch enforces device-class allow-listing so keyboards, mice, and a defined set of approved peripherals pass through, while USB mass storage, unauthorized HID, and other high-risk classes are rejected at the port, preserving the isolation guarantees the video matrix already provides.

Same 4K60 Matrix Core

Video routing performance matches the SX42PH-4 exactly, 4 sources, 2 independent 4K60 outputs, the difference is purely in the added, policy-controlled USB path.

Comparison to Alternatives

Choose this over the plain SX42PH-4 whenever policy requires more than keyboard/mouse pass-through. For TEMPEST-certifiable emissions requirements on the same feature set, the SX42PHU-4T is the direct sibling; for 8 sources, see the SX82PHU-4.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating8.3 / 10

The right pick when a 4-source dual-monitor matrix also needs policy-filtered USB peripheral support beyond basic keyboard and mouse.

Best for

Desks needing approved specialty USB peripherals beyond KB/mouse
Facilities requiring device-class filtering with dual-monitor video
4-source classified environments with strict peripheral policy needs

Not for

Sites with no peripheral needs beyond keyboard/mouse (SX42PH-4 is cheaper)
TEMPEST emissions-controlled spaces (use the SX42PHU-4T)
8-source requirements better served by the SX82PHU-4

Specifications

What these specs mean

Capability Score

8.2/10

How much this switch can do compared with other secure KVM switches, rated from its certification and specifications.

Design

Port Count	4
Switching Method	Front-panel and remote pushbutton, independent per output

Topology

Displays Per Computer	2 displays
KVM Segment	Secure

Video & Features

Video Standard	DisplayPort/HDMI
Max Resolution	4K@60Hz
USB Hub Ports	4
Audio Support	No

Per display capability

Max Refresh At Max Resolution	60 Hz
Max Refresh At 4K	60 Hz

Display continuity

EDID Emulation	Yes

Switching control

Hotkey Switching	No

In the box and price

Price	1443.33 USD

FAQs

What are the key specifications of the Secure 4x2 Mini-Matrix KVM DP/HDMI 4K60 with Filtered USB?

The Secure 4x2 Mini-Matrix KVM DP/HDMI 4K60 with Filtered USB is a KVM switch from Secure KVM Systems. Key specs: Port Count 4x2, Switching Method Front-panel and remote pushbutton, independent per output, Video Standard DisplayPort/HDMI, Max Resolution 4K@60Hz, USB Hub Ports 4.

Who is the Secure 4x2 Mini-Matrix KVM DP/HDMI 4K60 with Filtered USB best suited to?

Best suited to: Desks needing approved specialty USB peripherals beyond KB/mouse; Facilities requiring device-class filtering with dual-monitor video; 4-source classified environments with strict peripheral policy needs.

What are the drawbacks of the Secure 4x2 Mini-Matrix KVM DP/HDMI 4K60 with Filtered USB?

Not the best fit for: Sites with no peripheral needs beyond keyboard/mouse (SX42PH-4 is cheaper); TEMPEST emissions-controlled spaces (use the SX42PHU-4T); 8-source requirements better served by the SX82PHU-4.