Kramer SWT3-81-PR 8x1:2 4K60 USB–C/HDMI Presentation Switcher
Fast <1sec switching with Multi–view
Dual–screen USB–C sharing
Coupled AV+USB routing with flexible in/out HDBT 3.0 port
AEC DSP & mixer with analog & digital ports
Secured remote control and management
Kramer SWT3−81−PR is a high−performance video processing and fast−switching scaling switcher with coupled AV + USB routing. It has eight USB−C and HDMI/USB inputs, one interchangeable HDBaseT 3.0 input or output port, and mirrored HDMI output. The unit supports both local and remote content sharing and multi−view presentation capability. The switcher has integrated audio DSP and a rich set of analog and digital interfaces, for high−quality audio−visual experience during hybrid sessions in meeting spaces and halls.
- Premium Presentation Switcher — High–resolution scaling switcher with AV + USB routing
- Fast <1sec AV Routing — Clean and instantaneous routing between switcher inputs and outputs, with smooth and uninterrupted transitions
- Dual–screen (MST) USB–C signal routing from one of the USB–C presenters to a local and remote display
- Advanced video processing for multi–view presentations including side–by–side and picture–in–picture effects
- High–Performance Scaling Experience — Built–in ProcAmp high–resolution scaling technology for optimal up or down image scaling
- Enhanced Audio capabilities — Integrated echo cancelling and audio enhancement DSP for clear sound distribution to space deployed speakers. Both analog and digital audio interfaces with audio embedding and de–embedding capabilities with flexible and easily managed audio routing.
- Built–in IP–based control capabilities, enterprise–grade IT–networking and security, and optional enterprise site management.
- BYOD Ease and Convenience — Connect any DP–Alt–Mode–capable USB–C device as an AV presentation source and share content of either one or dual screens. The BYOD will enjoy AV display access, USB device access, ethernet connectivity and charging.
- Hybrid–meeting Collaborative Sessions — The switch enables deployment of either BYOD or UCC (MTR, Teams Room or similar) in the same meeting space. The display system and the USB devices may be hosted by either a BYOD device or a UCC with flexibility to deploy the UCC on any side of the HDBaseT link.
- High Performance Standard Extension — Professional HDBaseT 3.0 extension, for multi–signals distribution over extended–reach twisted–pair copper infrastructures
- Intelligent IP based switcher management. — Device may be controlled using a WEB GUI or by a controller utilizing Kramer’s P3K commands.
- Standard Enterprise–Grade Secured Operation — Standard IT–grade authentication for secured IT LAN connectivity, and secured web–UI browsing and communication, with OWASP–10 (Open Web Application Security Project) standard penetration protection certification, ensure secured remote end–user communication, customer operation, and switcher management.
- Easy and Elegant Installation — Highly integrated and compact device, with single cable connectivity for both HDBaseT signals and PoE power distribution to paired endpoint, substantially saves on space and solution wiring, mounting and installation, integration, and other associated deployment costs.

Inputs
2 Full-featured USB-C: On USB type–C female connectors
6 HDMI: On HDMI female connectors
1 Analog Mic: On a 6.3mm jack connector
4 Analog Mic or 4 Balanced Mono Audio or 2 Balanced Stereo Audio: On 3–pin terminal block connectors
Outputs
1 HDMI: On an HDMI female connector
1 Analog Audio Balanced Stereo Line Level: On a 5–pin terminal block connector
Interchangeable Inputs/Outputs
1 HDBT: On an RJ–45 female connector
Ports
1 1000BaseT Ethernet: On an RJ–45 female connector for LAN connection & extension
1 100BaseT Ethernet: On an RJ–45 female connectors for LAN connection & management
6 USB 3.2 Host: On USB type–B female connectors
3 USB 3.2 Device: On USB type–A female connectors
2 RS-232: On 3–pin terminal block connectors
2 GPIO: On 2–pin terminal block connectors
Video
Max Bandwidth: : 18Gbps (6Gbps per graphic channel)
Max Resolution: 4K@60Hz 4:4:4 24bpp resolution
Max Channel Resolution for Dual-channel Extension over HDBT: 4K@30Hz 4:4:4 24bpp resolution
Content Protection: HDCP 2.3
Compliance: HDMI 2.0b
Video Performance
Scaling: Up, down or cross–scaling
Minimum Input Scaled Resolution: 480p
Max Output Scaled Resolution: 4K@60Hz 4:4:4 24bpp resolution
Max Switching Time: 1sec
Max Frames Latency: 2
Multi View
Windows Layouts: PiP, PoP, Quad, Stacked, Side–by–side, Split
Max Layout Inputs: 4
USB-C
AV Compliance: MST DP Alt Mode
Max Input AV Streams: 2
USB Compliance: 3.2 Gen 2
Max USB 3.2 Data Rate: 10Gbps
Charging Compliance: PD 3.0
Max Charging Power Per Port: 60W
USB
Max USB 3.2 Data Rate: 10Gbps
Integrated USB Hubs (layers): 1
Standards Compliance: USB 3.2 GEN 2, 2.0 and 1.1
Extension Line
Direction: Transmit or receive
Direction: Note: On interchangeable HDBT port only
Reach: Up to 100m (330ft)
Reach: Note: When using Kramer HDBaseT cables
PoE+ Providing: 30W per 802.3at Type 2
Standards Compliance: HDBaseT 3.0
Extended USB
Max USB 2.0 Data Rate: 480Mbps
Max Transmitted Data Bandwidth: 300Mbps
Standards Compliance: USB 2.0 and 1.1
Extended Ethernet
Max Data Rate: 1 Gbps
Extended RS-232
Baud Rate: 1200 to 115200
Analog Audio Input
Impedance: Balanced: 20kΩ / Unbalanced: 10kΩ
Nominal Level: Balanced: +4dBu / Unbalanced: — 10dBV
Nominal Level: Note: Adjustable via input gain
Max Level: : >+21dBu
Max Level: : Note: At rated THD+N
CMRR: >70dB typical
Input Gain Adjustment: –20dB to +10dB, in 0.5dB steps
Microphone Input
Signal Type: Balanced: Condenser (with phantom power) / Unbalanced: Dynamic
Impedance: Balanced: 20kΩ / Unbalanced: 10kΩ
Nominal Level: –60dBV
Nominal Level: Note: Adjustable via input gain
Max Level: Condenser: — 18dBu/ Dynamic: — 36dBV
Equivalent Input Noise: <–120dBV (1.0 µVrms)
Equivalent Input Noise: Note: At +40dB input gain
CMRR: >70dB typical
Input Gain Adjustment: –30dB to +24dB, in 0.5dB steps
Input Gain Adjustment: Note: Adjustable per input
DC Phantom Power: +48 VDC
Analog Audio Output
Impedance: Balanced: 100Ω / Unbalanced: 50Ω
Gain: Balanced: 0dB / Unbalanced: — 6dB
Gain Error: ±0.1dB
Gain Error: Note: Channel to channel
Max Level: Balanced: +21dBu / Unbalanced: +15dBu
Output Volume Range: –90dB to +10dB, in 0.5dB steps
THD + Noise: <0.01%, 20Hz to 20kHz
THD + Noise: Note: At maximum level
Frequency Response: 20Hz to 20kHz, ±0.1 dB
Dynamic Range: 102dB typical
Dynamic Range: Note: 20Hz to 20kHz unweighted
S/N Ratio: >90dB, 20Hz to 20kHz
S/N Ratio: Note: At maximum balanced output (unweighted)
Crosstalk: ≤–90dB @ 20Hz to 20kHz
Crosstalk: Note: Fully loaded
Security
Web-UI Communication: HTTPS
User Access: Multiple roles and credentials
IT LAN Authentication: 802.1x
Penetration Protection Certification: OWASP–10
Power
Source: 85–240V AC
Max Consumption: 188W
Max Power Providing Per HDMI Port: 2.5W (5V@0.5A)
Max PoE Providing Power Per HDBT Port: 30W
HDBT PoE Providing Compliance: 802.3at, Type 2
Max USB-C Charging Power Per USB-C Port: 60W
USB-C Charging Compliance: PD 3.0
Max USB Device Per Port Charging Power: 5W (5V@1A)
Environmental Conditions
Operating Temperature: 0° to +40°C (32° to 104°F)
Storage Temperature: –40° to +70°C (–40° to 158°F)
Humidity: 10% to 90%, RHL non–condensing
Regulatory Compliance (Standards Compliance)
Safety: CE, FCC, UL
Environmental: RoHs, WEEE
Enclosure
Size: 19” 1U
Type: Aluminum
Cooling: Fan Ventilation
Max Fan Noise: 40dBA
General
Net Dimensions (W, D, H): 43.2cm x 30cm x 4.35cm (17" x 11.8" x 1.71")
Shipping Dimensions (W, D, H): 52.5cm x 33cm x 10.7 cm (21" x 13" x 4.2")
Net Weight: 2.356 kg (2.83lbs)
Shipping Weight: 3.3 kg (7.26lbs)
Accessories
Included: Power cords, 1 multi–signal USB–C cable (1m)
Product Dimensions
19" x 7.20 x 1U (43.6cm x 18.30cm x 4.36cm) W, D, H
Product Weight
2.9kg (6.4lbs) approx.
Kramer MTX3-88-PR-PRO 8x8 4K60 All in one Hybrid Presentation Matrix
AV + USB presentation matrix
Unmatched flexibility with 8 bi–direction HDBT 3.0 ports
2 USB–C ports for presenter use, supporting dual–stream extended desktop
Clean and fast switching between video sources
Advanced video processing including scaling, dual video wall and multi view options
Extensive splash–screen support, built–in video test patterns and video overlay features
Network output streamer/encoder (H.264/5) and wireless presenter input
Feature–rich audio function–set, including powerful DSP, dual–zone amplifier, Dante and more
Secure (802.1X) IP remote management
MTX3-88-SE 8x8 Seamless Multi–viewer Matrix
Seamless 8X8 matrix
8x2 quad–view seamless matrix
4K60 4:4:4 scaling resolution
Dual mirrored HDBT 3.0 outputs
Secured remote control and management
Fade–Thru–Black (FTB™) Switching
Auto–input Switching
Dual Scalers with Independent Outputs
Output Resolutions — Up to 4K30 UHD (720P on Preview Output)
HDBaseT support
Selectable Audio Delay
Stereo Speaker Output
Built–in Video Proc–Amp
Control Options — Front Panel Buttons, OSD Menu, IR, RS–232, Ethernet with Web browser
Fade–Thru–Black (FTB™) Switching
Auto–input Switching
Dual Scalers with Independent Outputs
Output Resolutions — Up to 4K30 UHD (720P on Preview Output)
Selectable Audio Delay
Stereo Speaker Output
Built–in Video Proc–Amp
Control Options — IR RS–232, Ethernet with Web browser
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