SmartAVI SM-UHN-4D-S
Expert rating8.2 / 10
- Port Count:
- 4
- Video Standard:
- HDMI (dual-head)
- Max Resolution:
- 4K@60Hz per head
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Manufacturer: SmartAVI Last updated: 2026-09-12
SmartAVI SM-UHN-4D-S (4-Port Dual-Head Ultra-HD HDMI KVM Switch / $674.25) Review
SmartAVI SM-UHN-4D-S 4-port dual-head HDMI 4K60 KVM switch USB audio
Brings dual-monitor 4K60 HDMI switching to four systems, letting content creators and engineers running two HDMI screens jump between machines instantly without a resolution downgrade.
Full 4K60 on Both Heads
Many dual-head switches cap out at 30Hz or 1080p on the second display; the SM-UHN-4D-S keeps both HDMI heads at a full 4K@60Hz, which matters for video editors and CAD users running matched high-resolution monitors.
Comparison to Alternatives
It's SmartAVI's HDMI-native counterpart to the SM-DPN-4D-S in this same batch, which does the identical job over DisplayPort. Against ATEN's CS1944DP, the SM-UHN-4D-S trades DisplayPort for HDMI and true dual-head support, better suited to HDMI-first creative workstations.
Specifications
Design
| Port Count | 4 |
|---|---|
| Switching Method | Front-panel pushbutton + hotkey |
Video & Features
| Video Standard | HDMI (dual-head) |
|---|---|
| Max Resolution | 4K@60Hz per head |
| USB Hub Ports | 3 |
| Audio Support | Yes |
In the box and price
| Price | 674.25 USD |
|---|
| Brand | SmartAVI |
|---|---|
| Model | SM-UHN-4D-S |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8.2 / 10
One of the stronger dual-head 4K60 HDMI options in this price range; skip it if your monitors are DisplayPort.
Best for
- Dual-monitor HDMI workstations
- Video editors needing full 4K60 on both heads
- Engineers switching four HDMI systems
Not for
- DisplayPort-native monitor setups
- Single-monitor desks
- Budget single-head switching
FAQs
What are the key specifications of the SmartAVI SM-UHN-4D-S (4-Port Dual-Head Ultra-HD HDMI KVM Switch / $674.25)?
The SmartAVI SM-UHN-4D-S (4-Port Dual-Head Ultra-HD HDMI KVM Switch / $674.25) is a KVM switch from SmartAVI. Key specs: Port Count 4, Switching Method Front-panel pushbutton + hotkey, Video Standard HDMI (dual-head), Max Resolution 4K@60Hz per head, USB Hub Ports 3.
Who is the SmartAVI SM-UHN-4D-S (4-Port Dual-Head Ultra-HD HDMI KVM Switch / $674.25) best suited to?
It suits dual-monitor hdmi workstations, video editors needing full 4k60 on both heads, engineers switching four hdmi systems.
What are the drawbacks of the SmartAVI SM-UHN-4D-S (4-Port Dual-Head Ultra-HD HDMI KVM Switch / $674.25)?
It is a poor fit for displayport-native monitor setups, single-monitor desks, budget single-head switching.
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