4-Port, Quad-Head HDMI (4K/60Hz) Ultra-HD KVM switch w/ USB 2.0 and Audio


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Video Type: HDMI (up to 4K/60Hz)
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The SmartAVI SM-UHN-4Q-S (formerly UHDN-4P-QUADS) is a 4-port, quad-head HDMI 2.0 KVM switch with Ultra-HD 4K/60Hz resolution video emulation. It can control keyboard-mouse functions on up to four remote computers, and emulates video from HDMI source devices.

 SM-UHN-4Q-S Use Diagram
 SM-UHN-4Q-S Back Panel

SM-UHN-4Q-S (formerly UHDN-4P-QUADS) Features & Benefits

  • Supports up to Ultra-HD 4K (3840x2160) @ 30/50/60Hz.
  • Supports 3D.
  • Supports LPCM, Dolby-AC3, DTS7.1, and DSD/Dolby TrueHD/DTS-HD master audio.
  • Supports HDMI 1.3, 1.4, & 2.0.
  • HDMI and HDCP compliant.
  • Control up to four computers with a single KVM.
  • Full EDID HDMI video emulation.
  • Zero pixel loss with TMDS signal correction.
  • Supports USB Keyboard-Mouse emulation.
  • Supports all USB 2.0 devices.
  • Rack mountable in a standard 19 inch rack (rackmount kit sold separately)
  • Hot key commands for quick channel selection.
  • Independent (asynchronous) switching of KVM and peripheral USB ports. Users can scan a document and save in another computer.
  • Complete KVM emulation for error free booting.
  • Easy switching via front-panel, RS-232 or hot keys.
  • Full HDMI support, backwards compatibility.

SM-UHN-4Q-S Package Includes

SmartAVI  SM-UHN-4Q-S (formerly UHDN-4P-QUADS)d Package Contents

  • (1) SM-UHN-4Q 4-Port, Quad-Head Ultra-HD 4K/60Hz KVM Switch
  • (1) PS5VD4A Power Supply
  • (1) Quick Installation and User Guide

SmartAVI SM-UHN-4Q-S (formerly UHDN-4P-QUADS) Specifications

Link Rate5.4 Gbps
Input Interface(16) HDMI 2.0 Female
Output Interface(2) HDMI 2.0 Female
Resolution480i to 4Kx2K @ 60 Hz (YUV420)
Input EqualizationAutomatic
Bandwidth300 MHz, 10.2 Gbps
HDCP CompliantYes
Max Cable Length40 ft. (Dependent upon quality)
Input(4) 3.5mm Stereo Audio Jack
Output(1) 3.5mm Stereo Audio Jack
Frequency Response20Hz - 20KHz
Nominal Level0.0 - 1.0 V
Common ModeRejection @ 60 db
Signal TypeUSB 2.0, 1.1 and 1.0 w/ internal hub
Input Interface(4) USB Type B Female
Output Interface(2) USB 1.1 Type A for Keyboard and mouse; (2) USB Type A Transparent
Front PanelButtons
RS-232Via SmartControl @ 9600 bps
Hot KeysVia Keyboard
EmulationKeyboard, Video, Mouse
PowerExternal 100-240 VAC/ 5VDC4A @ 20W
Consumption20 W (Max)
Dimensions4.5"H x 5.75"D x 12.75"W
Weight5.75 lbs
ApprovalsUL, CE, ROHS Compliant
Operating Temperatures23 to 95°F (-5 to 35°C)
Humidity5 to 90% RH, non-condensing

the SM-UHN-4Q-S was formerly the UHDN-4P-QUADS.

Question: I'm looking at a couple Quad Monitor KVMs on your site. Namely the UHDN-4P-QUADS and the DPN-4Quad-S models, and had a couple questions. The intent of the device is to share a set of diagnostic medical monitors (resolution of 2048x2560). I see the only difference between the two is the inputs (Displayport vs HDMI) and refresh rate (60Hz vs 30Hz). If I required a 60Hz refresh rate, I would have to go to the UHDN-4P-QUADS model with a couple adapters? What adapters would that be, and what functionality would I be loosing using the adapters? Would the adapters support the resolution, I'm looking for?
Answer: Thank you for your inquiry,

That is correct, only this UHDN-4P-QUAD would support 2048x2560 resolution at 60Hz.

For DisplayPort sources, you could use for example this TrippLite DisplayPort 1.2 to HDMI 2.0 adapter which supports full 2048 x 2560 @ 60Hz. There shouldn't be any lost functionality such as loosing EDID or DPCP in using this adapter, but please note, support of the resolution and functionality would depend on which adapter you would use. We cannot guarantee functionality of a third party adapter with a SmartAVI KVM.

Please let us know if there is anything else we can help you with!

Question: If connected with NVidia GSync or AMD FreeSync, will this allow the these technologies to continue functioning (i.e. for gaming, etc...)?
Answer: Thank you for your inquiry,

According to the vendor, they have not tested it, but the HDMI 2.0 port should support it.

Please let us know if there is anything else we can help you out with!