The ALF-SCK41TS is a 4K seamless scaler switcher with six video inputs (2 x Shared –  2 x HDMI, 1 x HDMI / DP, 1 x HDMI / USB C). The ALF-SCK41TS scales and switches any video signal to HDMI output and HDBaseT output; it supports PoC and connects to an HDBaseT Receiver, up to a maximum transmission distance of 70m for full HD and 40m for 4k.

Additionally, the ALF-SCK41TS can be controlled via front panel buttons, IR remote, RS232 commands, CEC, and web-based GUI.

Product Features

    • HDMI 1.4, HDCP 2.2, 10.2G, up to 4K@30Hz 4:4:4
    • HDBaseT Technology, 40m 4K , 70m@1080p.
    • Multi-View with 16 presets and 4 User Customization layouts.
    • Reposition and resize the windows.
    • Seamless switching between windows.
    • One-way POC from the switcher to the receiver.
    • Includes Receiver.
    • PSU: DC 24V, 2.71A, Locking DC.
    • Chassis dimension: 250mm (W) x 44mm (H) x 200mm (L)
    • Bi-directional IR and RS232 control.


Video Input
Video Input (4) HDMI IN (1~4), (1) DP, (1) USB-C
Video Input Connector (4) Type-A female HDMI, (1) DisplayPort, (1) Type-C USB
Input Resolution HDMI: Up to 4K@30Hz 4:4:4
DP: Up to 4K@30Hz 4:4:4
USB-C: Up to 4K@30Hz 4:4:4
Video Output
Video Output (1) HDMI, (1) HDBaseT
Video Output Connector (1) Type-A female HDMI, (1) RJ45
Output Resolution HDMI: Up to 4K@30Hz 4:4:4
HDBaseT: Up to 4K@30Hz 4:4:4
HDMI Standard Up to 1.4
HDCP Version Up to 2.2
Audio Input
Audio Input (1) LINE, (1) MIC
Audio Input Connector (2) 3-pin terminal blocks
Frequency Response 20Hz ~ 20kHz, ±3dB
Max Input Level 2.0Vrms ± 0.1
L-R Level Deviation < 0.3dB, 1kHz sine at 0dBFS level (or max level before clipping)
Input Impedance > 10KΩ
LINE/MIC Audio Format PCM 2.0
HDMI/DP Audio Format PCM 2.0 48K
L+R Audio Output
Audio Output (1) L+R
Audio Output Connector (1) 5-pin terminal block
Frequency Response 20Hz ~ 20kHz, ±1dB
Max Output Level 2.0 ± 0.1Vrms
THD+N < 0.05%, 20Hz ~ 20kHz bandwidth, 1kHz sine at 0dBFS level (or max level)
SNR > 80dB, 20Hz ~ 20kHz bandwidth
Crosstalk Isolation < -70dB, 10kHz sine at 0dBFS level
L-R Level Deviation < 0.3dB, 1kHz sine at 0dBFS level (or max level before clipping)
Output Load Capability 1KΩ and higher (Supports 10x paralleled 10KΩ loads)
Noise Level -80dB
SPDIF Audio Output
Audio Out Connector (1) Toslink
Max Output level ±0.3dBFS
Frequency Response 20Hz ~ 20kHz, ±1dB
THD+N < 0.05%, 20Hz ~ 20kHz bandwidth, 1kHz sine at 0dBFS level (or max level)
Signal-to-Noise Ratio > 90dB, 20Hz ~ 20kHz bandwidth
Crosstalk isolation < -70dB, 10kHz sine at 0dBFS level (or max level before clipping)
Noise – 90dB
Audio Format PCM 2.0
Control port (1) CONTACT IN, (1) IR IN, (1) IR OUT, (1) IR EYE,

(1) FIRMWARE, (1) RS232, (1) TCP/IP

Control Connector (1) 5-pin terminal block, (3) 3.5mm jack, (1) Type-A USB,

(1) 3-pin terminal block, (1) RJ45

Operation Temperature -5℃ ~ +55℃
Storage Temperature -25℃ ~ +70℃
Relative Humidity 10% ~ 90%
External Power Supply Input: AC 100~240V, 50/60Hz; Output: 24V DC 5A
Power Consumption 90w (Max)
USB-C Power Charging 60w (Max)
Dimension (W*H*D) 250mm x 44mm x 200mm
Net Weight 1.6KG


 TPBHD70-R Receiver

Input and Output
Input (1) HDBT IN
Input Connector (1) RJ45
Output (1) HDMI OUT
Output Connector (1) Type-A female HDMI
Control (1) IR IN, (1) IR OUT, (1) RS232
Control Connector (2) 3.5mm jack, (1) 3-pin terminal block
Maximum Video Resolution 4K@30Hz 4:4:4, including 1080p@60Hz
Transmission Mode HDBaseT
Transmission Distance 1080p signal to 70m, 4K signal to 40m
Bandwidth 10.2Gbps
Video Standard HDMI 1.4 with HDCP 2.2
Power Consumption 7 watts
Operation Temperature -5℃ ~ +55℃
Storage Temperature -25℃ ~ +70℃
Operating Humidity 0% ~ 90%
Power Supply Input Power: 24VDC 1.25A or Power over HDBaseT (PoH);

AC Adaptor Input Power: 100~240VAC, 50/60Hz

Dimension (W*H*D) 115mmx16.2mm x109mm
Net Weight (g) 196g



Technical Sheet

User Manual

3rd Party Control

ALF-SCK41TS – Crestron Driver


1)   Q – What is the ALF-SC41TS?

A – It is a 4 input (2 shared inputs), 1 mirrored output seamless scaler switcher

2)  Q – Can the shared inputs be used simultaneously?

A – No it cannot. Either the DisplayPort / USB-C or HDMI can be used

3)  Q – How is the device controlled?

A – The device supports RS232, contact in, IR as well as TCP/IP

4)  Q – Does the unit support audio out?

A – Yes, it has balanced L+R audio and TOSLINK out

5)  Q – How many multi-view presets are there?

A – There are 16 multi-view modes that can be selected