Alfatron ALF-WUK4A


Alfatron ALF-WUK4A

The ALF-WUK4A is a 4K HDMI switcher with 4 HDMI inputs and 1 HDMI Output with Audio De-Embedding, and EDID, RS232 and IR Control. Select any of the inputs via the front panel button or IR Remote, the corresponding indicator on the front panel will illuminate to show real-time I/O connection status. Compliance with HDMI 2.0 & HDCP 2.2, 4K@60 4:4:4 HDMI Switcher 4×1 can transmit uncompressed 4K (at max) signal. The ALF-WUK4A boasts comprehensive audio capacities including PCM, Dolby Digital, DTS, and DTS-HD. It also provides an ARC audio output socket to transfer ARC audio to ARC speakers. Moreover, 4K HDMI Switcher 4×1 supports convenient online firmware update through the USB port.

Product Features

  • 4 HDMI inputs
  • 1 HDMI Output
  • Supports Hot-Plug
  • Compliant with HDMI 2.0 and capable of transmitting 4K@60Hz 4:4:4, HDR
  • High bandwidth: 18Gbps
  • HDCP 2.2 compliant, supports auto-detecting for input HDCP compliance status
  • Controllable via RS232 and IR
  • Supports CEC
  • Supports audio return channel (ARC)
  • Supports EDID management, including 5 embedded EDID data, 10 user-definable EDID data (max), and EDID data automatically captured and copied
  • Intuitive indicators for power, switch mode, I/O connection status, and audio output signal


  Video Input 
Input  (4) SOURCE 1~4 
Input Connector  (4) Female type-A HDMI 
HDMI Input Resolution  Up to 4Kx2K@60Hz 4:4:4, HDR10, Dolby Vision 
HDMI Standard  2.0 
HDCP Version  2.2 
Video Output 
Output  (1) DISPLAY 
Output Connector  (1) Female type-A HDMI 
HDMI Output Resolution  Up to 4Kx2K@60Hz 4:4:4, HDR10, Dolby Vision 
HDMI Standard  2.0 
HDCP Version  2.2 
Output  (1) AUDIO OUT 
Output Connector  (1) 3.5mm mini stereo audio jack 
Audio Format  PCM 2CH 
Frequency Response  20Hz to 20KHz, ±1dB 

Max Output Level 

2.0Vrms ± 0.5dB. 2V = 16dB headroom above -10dBV (316 mV) nominal consumer line level signal. 


< 0.05%, 20Hz – 20KHz bandwidth, 1KHz sine at 0dBFS level 

(or max level). 

SNR  > 80dB, 20Hz – 20KHz bandwidth. 

Crosstalk Isolation 

< -80 dB, 10 kHz sine at 0dBFS level (or max level before clipping). 

L-R Level Deviation 

< 0.05 dB, 1 kHz sine at 0dBFS level (or max level before clipping). 
Output Load Capability  1Kohm and higher (supports 10x paralleled 10k ohm loads). 
Noise Level  -80dB 
Control  (1) FW, (4) PC 1~4, (3) DEVICES 1~3, (4) GR 1~4, (1) RS232 



Control Connector 

(1) Micro-USB, (4) Type-B USB, (3) Type-A USB, (5) 3-pin Terminal Blocks 
Bandwidth  18Gbps 
Operation Temperature  -10~ +55 
Storage Temperature  -25~ +70 
Relative Humility  10%-90% 
Type-A USB Power Supply  1A 
System Power Supply  Input:100V~240V AC; Output: 12V DC 2A 
System Power Consumption  14W(Max) 
Dimension (W*H*D)  200mm x 40mm x 100mm 
Net Weight  685g 

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Technical Sheet

User Manual



1) Q – What is the ALF-WUK4A?

    A – The unit is a 3 x 1 HDMI switcher.

2) Q – What is the maximum resolution the device can handle?

    A – It supports full 4K x 2K at 60fps 4:4:4

3) Q –  How is the device controllable?

      A – Via RS232 as well as IR.

4) Q – What audio formats are supported by the device?

    A – Supports PCM, Dolby Digital, DTS, and DTS-HD.

5) Q – Can the EDID be set?

     A – Yes, there is a DIP switch that can set the predefined EDID.