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SY Electronics SMS44-18G

4×4 HDMI Seamless Matrix Switcher

4 × HDMI 2.0 inputs; 4 × HDMI 2.0 outputs; Max bandwidth 18Gbps

£1993 (£2391.60 inc. VAT)
Availability: 3-5 days

SY Electronics SMS44-18G

The SMS44-18G is a high-performance 4x4 HDMI 18Gbps seamless switching matrix. This unit has a powerful wide range scaler to scale up or down most resolutions and refresh rates up to 4K 60Hz. Video Wall Processing to make up to a 2x2 video wall. Flexible audio embedding/de-embedding. Also For commissioning and testing there is a test pattern generator built-in.

Out of the box, it will operate as a fully-fledged 4x4 Matrix switch. All these amazing features are packed in an easy to install 19” 1U rack-mount unit, making it suitable for a wide variety of applications within the residential, education, commercial and hospitality sectors.

  • 4x4 HDMI Matrix — Full 18G signal processing throughout the entire signal path, from the input to the output. Capable of handling HDR signals and resolutions up to 4K60 4:4:4 with a bandwidth of 18Gbps.
  • Seamless Switcher — Switching is performed seamlessly with no black between the video transition. The current matrix routing configuration can be stored into a choice of 8 Pre-Sets. These may be recalled by using the front panel buttons, RS232 or PC App.
  • 4K Scaler — Scaling is performed by controlling the ‘Refresh Rate' and ‘Resolution'. Each output can be independently scaled up or down from a very extensive range of resolutions and refresh rate options up to 4K 18G
  • Video Wall Processor - Video Wall processing settings can be used to create multiple Video Walls using some or all of the 4 HDMI outputs. The functions include ‘Stitch/Un-Stitch' to place any of the 4-outputs in/out of a video wall. Whilst unstitched from the video wall any of the 4 inputs can be selected independently from the video walls source. These configurations can be saved as Scenes which are recalled via pre-set memory locations.
  • Bezel Compensation — Adjusts the rendering to avoid a disjointed look due to the existence of a framing around your display. This produces a more continuous image across the displays and provides a more realistic experience.
  • Audio Embedder and De-embedder — Audio embedding via Analogue Audio Inputs using 3 pin Phoenix terminal connectors.
  • The De-embed Audio outputs can choose between any of the 4 inputs. Outputs are via Balanced Analogue L/R audio (5 pin Phoenix terminal connectors) and Un-balanced Analogue L+R audio and Digital Toslink audio (combined 3.5mm TRS Jack). Full audio signal routing can be performed by using the PC App. By default, the audio will follow video.
  • EDID Management — This unit has several EDID options, and also the ability to utilise any of the onboard pre-set EDIDs settings, which can be fed to any input selectively. Read EDID from any output and import EDIDs '.bin' files.
  • HDCP Control — Support and ‘Management of HDCP' ensures compatibility, allowing you to control the HDCP for each output. You can convert from HDCP 2.2 down to HDCP 1.4, or simply put the unit into Cascade Mode to allow for operation of mixed HDCP version equipment.
  • Video Tuning — Fine Tuning of the picture is afforded via the ‘PQ' function which is accessible through the Web GUI.
  • Test Pattern Generator — Onboard Test Pattern generation per output is included allowing for easy test and set up of all outputs.
  • Input/Output locking — Front Panel control can be set to 'Panel lock' this feature is will stop accidental switching of the unit from the front panel buttons
  • Control - Control of the many signal routing and signal handling choices can be carried out via Front panel buttons, PC App, RS232, TCP/IP, Web GUI.
  • Web GUI — Offers refined simplistic control of parameters.
  • PC App — Offers the most complete control over all settings including customisable Input and Output name labels.
  • Front panel — Control of all video routing, scaling, Presents and EDID Management. This unit has a unique button locking system which will allow selected inputs and/or outputs to but locked, ensuring no accidental switching can occur
RS-232 Control
IR Control
Ethernet Control
4K 4096*2160 and 3840*2160 Resolution
HDMI 2.0
HDR (High Dynamic Range)

SY Electronics SMS44-18G Specifications

Video Resolutions

Input Resolution Examples All HDMI Resolutions To 4096×2160p 60hz 4:4:4
4096 × 2160p 24/25/30/50/60Hz, 3840 × 2160p 24/25/30/50/60Hz, 2560 × 1440 50/60Hz, 1920 × 1200 60/65/75Hz, 1920 × 1080p 24/25/30/50/60Hz, 1920 × 1080i 50/60Hz, 1680 × 1050 60/75Hz, 1600 × 1200 60/65/70/75Hz, 1600 × 1024 60/75Hz, 1600 × 900 60/75Hz, 1440 × 900 60/75Hz, 1400 × 1050 60/75Hz, 1366 × 768 60Hz, 1360 × 768 60Hz, 1280 × 1024 60/72/75/85Hz, 1280 × 960 60/75/85Hz, 1280 × 800 60/75Hz, 1280 × 768p 50/60/75Hz, 1280 × 720p 25/30/50/60/75Hz, 1024 × 768p 60/70/75/85Hz, 800 × 600p 60/72/75/85Hz, 720 × 576p 60Hz, 640 × 480p 60/65/85Hz
Output Scaler Resolution Examples 3840 × 2160p 25/30/50/60Hz, 1920 × 1200p 60Hz, 1920 × 1080p 50/60Hz, 1600 × 1200 60Hz, 1400 × 1050 60Hz, 1366 × 768 60Hz, 1360 × 768 60Hz, 1280 × 1024 60Hz, 1280 × 768 60Hz, 1280 × 720p 50/60Hz, 1024 × 768p 60Hz, Auto mode


Bandwidth 18Gbps


Video in 4x HDMI 2.0
Audio in 4x 3pin Phoenix screw terminal connectors for un-balanced line audio
Frequency Response 20Hz - 20KHz, 1.0Vrms max.
Audio Embedding Any input audio can be routed to any Video Input
IR in 4x TRS 3.5mm Jack, 30Hz - 6KHz carrier
Video out 4x HDMI 2.0
Audio out 4x TRS 3.5mm Jack for Toslink and L+R unbalanced audio
4x 5pin Phoenix screw terminal connectors for balanced line audio
Frequency Response 20Hz - 20kHz, 1.0Vrms max.
IR out 4x 3.5mm Jack, 30Hz - 60kHz carrier
Audio Format Supported 2.0 / 5.1 / 7.1 channel LPCM, Dolby, AC3, DTS
Audio De-embedding Any input audio can be routed to any Audio Output (or follow the HDMI Audio)


RS232 via 3 pin Phoenix screw terminal connector
LAN via RJ45
IR Control Matrix 4 × IR Inputs via 3.5mm TRS Jacks
4 × IR Outputs via 3.5mm TRS Jacks
IR Follows Video' Input functionality


Power Supply IEC- 110~240V AC
Power Consumption 50W max.
Weight 3.3kg
Dimensions (W×H×D) 437 × 44 × 222
(19in 1U rack mount)
In The Box 1 × SMS44-18G
2 × Rack mounting brackets (already fitted)
1 × IEC lead
1 × SMS44-18G User manual


Operating Temperature 0 to +40°C (+32 to +104°F)
Operating Humidity 20 to 80 % RH (non-condensing)

SY Electronics SMS44-18G Possible Alternatives

Product CodeDescriptionPriceInc. VAT
CYP OR-44-4K22 4 × 4 4K HDMI Matrix Switch with Audio De-Embedding 4 × HDMI inputs; 4 × HDMI outputs; UHD, HDMI 2.0, HDCP2.2, HDR £577 £692.40
CYP OR-44U-4K22 4 × 4 4K HDMI Matrix Switch with Audio De-Embedding 4 × HDMI inputs; 4 × HDMI outputs; UHD, HDMI 2.0, HDCP2.2, HDR, USB power for extenders £733 £879.60
CYP OR-88U-4K22 8 × 8 4K HDMI Matrix Switch with Audio De-Embedding 8 × HDMI inputs; 8 × HDMI outputs; UHD, HDMI 2.0, HDCP2.2, HDR, USB power for extenders £1776 £2131.20
Kramer VS-44H2 4 × 4 4K HDMI 2.0 HDR Matrix Switcher4 × HDMI inputs; 4 × HDMI outputs; Max. bandwidth 18Gbps £1920 £2304.00
Kramer VS-44H2A 4 × 4 4K HDMI 2.0 HDR Matrix Switcher with audio de-embed 4 × HDMI inputs; 4 × HDMI, 4 × S/PDIF, 4 × 5-pin terminal block audio outputs; Max. bandwidth 18Gbps £2292 £2750.40
Kramer VS-66H2 6 × 6 4K HDMI 2.0 HDR Matrix Switcher 6 × HDMI inputs; 6 × HDMI outputs; Max. bandwidth 18Gbps £2883 £3459.60
Lightware MX2-4x4-HDMI20-CA 4 × 4 HDMI 2.0 4K Matrix Switcher with Ethernet/RS-232/LCD Menu control 4 × HDMI inputs; 4 × HDMI outputs; Max. 4K UHD @ 60Hza 4:4:4, 18Gbps £4080 £4896.00