Adder Technology
ADDERLink XD-C650 Quad-Head 4K DisplayPort KVM Extender Pair
Best high-performance extender for demanding multi-monitor control room environments.
The ADDERLink XD-C650 Quad-Head KVM Extender Pair offers reliable, high-quality remote access for demanding control room and enterprise applications. It provides seamless extension of 4K video, USB 2.0, and audio over a single CATx or fiber connection. Designed for precision and reliability, this system ensures instant access to critical systems without compromising user experience. Enjoy effortless plug-and-play functionality with extension distances up to 100m over CAT6 or 4km over optical fiber, supporting quad-head 1920x1200@60Hz or single 4K60 video.
$2349.90
Owner Satisfaction
4.5
/ 5
Category Rank
114
/ 1363
#114 in KVM Switches
Price vs Category Average
+116%
Above average
Maximum Single Screen Resolution
4096216060
/ × @ Hz
Who it's for
- Command center operators needing reliable multi-monitor 4K clarity
- IT managers looking to simplify complex cabling infrastructure
- Creative professionals requiring pixel-perfect, real-time video responsiveness
Who should skip it
- Budget-conscious buyers seeking entry-level KVM solutions
- Facility planners requiring long-distance fiber optic connectivity
- Users without specialized technical expertise for complex configurations
Performance breakdown
Video Versatility
Seamlessly handles quad-head setups or high-bandwidth 4K60 streams with ease.
Extension Range
Fiber connectivity pushes signal reach far beyond standard copper limitations.
Input Latency
Near-zero delay ensures responsive control for critical, high-stakes environments.
Setup Simplicity
True plug-and-play functionality eliminates the need for complex driver installations.
Peripheral Compatibility
Robust USB 2.0 support ensures reliable connection for essential input devices.
Build Reliability
Industrial-grade construction designed for continuous operation in demanding control rooms.
Key Specs
Maximum Single Screen Resolution
4096 × 2160 @ 60 Hz
Maximum Quad-Head Resolution
1920 × 1200 @ 60 Hz (MST)
Video Standard
DisplayPort 1.2 MST
Maximum Extension Distance
100 m over CAT6 or 4 km over Fiber
USB Support
Emulated and Transparent USB 2.0
Audio
Bi-directional 24-bit / 96 kHz Analog; 2-channel 192 kHz Digital over DP
Serial Port
1 × RS-232 up to 115200 baud
Dimensions
186 × 39 × 148 mm for both units
Features
- Extends quad-head 4K DisplayPort KVM up to 4km
- Supports emulated and hi-speed USB 2.0
- Plug and play operation, no drivers needed
- Digital and analog bi-directional audio
- EDID management for optimal compatibility
- Low latency for responsive control
- Includes RS232 serial communications
- Supports single 4K60 or quad 1920x1200 video
What customers say
Professional users highly value the ADDERLink XD-C650 for its exceptional reliability and flawless performance extending uncompressed 4K video across four displays without noticeable latency. Its robust build quality and sophisticated EDID management ensure smooth operation in mission critical environments like control rooms. While the initial investment is substantial, users confirm the premium price is justified by the best in class stability and consistent results. The system earns strong satisfaction among those needing uncompromising KVM extension technology, despite requiring specialized expertise for initial setup.
Know before you buy
The XD-C650 supports a maximum extension distance of 100 meters when using CAT6 cabling. If you require longer distances, you can extend up to 4 kilometers using optical fiber.
Yes, the system is flexible. It supports either a single 4K60 display or a quad-head configuration with resolutions up to 1920x1200 at 60Hz.
No, the XD-C650 is a true plug-and-play device. It does not require any drivers or additional software to function, making it easy to integrate into existing setups.
It features emulated and transparent USB 2.0 support. This ensures high-speed connectivity for your keyboard, mouse, and other essential peripherals without latency issues.
The system supports both. It provides bi-directional 24-bit/96kHz analog audio via 3.5mm jacks and 2-channel 192kHz digital audio over the DisplayPort connection.
EDID management ensures that your computer receives the correct display information from your monitors. This prevents resolution or compatibility issues, ensuring an optimal image is delivered to all four screens automatically.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$2350