
CONTENTS 
INTRODUCTION ..............................................................1
FEATURES & CONTENTS............................................... 2
SPECIFICATIONS ............................................................3
FRONT PANEL ................................................................4
BACK PANEL .................................................................10
REMOTE CONTROL .....................................................12
RS-232 / ETHERNET SERIAL INTERFACE ..................14
EDID FUNCTIONS .........................................................15
IR EXTENDER ...............................................................18
TYPICAL APPLICATION ...............................................19
INTRODUCTION
The SB-5645AK is a professional 4x4 matrix routing switch. 
Supporting (4) HDMI Inputs and (4) Auxiliary Audio Inputs and (4) 
HDMI Outputs and (4) SPDIF audio Outputs. The SB-5645AK is 
based on HDMI standards and supports full resolution HDMI video 
with embedded EDID, with a signal bandwidth of 340Mhz, so there 
is  no  signal  degradation.  High  Denition  Digital  signals  can  be 
selected and distributed to any of the (4) Inputs to the (4) outputs. 
The switcher is certied as being fully CEC, ARC and HDCP 1.3 
compliant with HDMI 1.4a, 4K2K@30Hz, DVI 1.0 and 3D formats 
with a wide frequency range 25MHz~340MHz. Using the build-
in HDMI signal booster function, the HDMI output is capable of 
driving cable lengths for 1080p up to 98 feet (30M) & 4K2K@30Hz 
up to 66 feet (20M). Supports UXGA/WUXGA/DVI 1920x1200 
resolutions to any HD displays. The EDID management can be 
selected between (7) different modes. Control is provided via front 
panel push buttons, IR remote, RS-232 or TCP/IP (not a web-
browser). A RS-232 Windows GUI interface is also provided for 
matrix routing control (Windows only).
1
HDMI-AUDIO MATRIX SWITCHER SERIES
Thank you for purchasing the SB-5645AK HDMI Matrix Switch with Auxiliary. You will nd this unit easy to install and highly
reliable but it is essential that you read this manual thoroughly before attempting to use 4x4 HDMI Matrix switcher.
TABLE OF CONTENTS
SAFETY PRECAUTIONS 
Please read all instructions before attempting to unpack, install or 
operate this equipment and before connecting the power supply. 
Please keep the following in mind as you unpack and install this 
equipment:
•   Always follow basic safety precautions to reduce the risk of re, 
electrical shock and injury to persons.
•  To prevent re or shock hazard, do not expose the unit to rain, 
moisture or install this product near water.
•   Never spill liquid of any kind on or into this product.
•   Never push an object of any kind into this product through any 
openings or empty slots in the unit, as you may damage parts 
inside the unit.
•  Do not attach the power supply cabling to building surfaces.
•  Use only the supplied power supply unit (PSU). Do not use the 
PSU if it is damaged.
•  Do not allow anything to rest on the power cabling or allow any 
weight to be placed upon it or any person walk on it.
•  To protect the unit from overheating, do not block any vents or 
openings in the unit housing that provide ventilation and allow for 
sufcient space for air to circulate around the unit. 
DISCLAIMERS
The information in this manual has been carefully checked and 
is believed to be accurate. We assume no responsibility for any 
infringements of patents or other rights of third parties which may 
result from its use.
We assume no responsibility for any inaccuracies that may be 
contained in this document. We make no commitment to update 
or to keep current the information contained in this document.
We reserve the right to make improvements to this document 
and/or product at any time and without notice.
COPYRIGHT NOTICE
No part of this document may be reproduced, transmitted, 
transcribed, stored in a retrieval system, or any of its part translated 
into any language or computer le, in any form or by any means 
— electronic, mechanical, magnetic, optical, chemical, manual, 
or otherwise — without express written permission and consent.
© Copyright 2016. All Rights Reserved.
Version 1.4 JULY 2015
5645AK-20150630-001
TRADEMARK ACKNOWLEDGMENTS
All products or service names mentioned in this document may 
be trademarks of the companies with which they are associated.
IMPORTANT WARRANTY INFORMATION.
If you remove the HDMI screw posts, you must 
use the provided HDMI Locking Post replacement 
screws to keep the internal HDMI jack secure. 
Removing the HDMI screws without installing the 
HDMI Locking Post replacement screws will void 
your warranty.
LOOK A PUPPY!! NOW READ THIS!!