Adder Professional VGA Quad Monitor 4-Port USB KVM switch


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Video Input: VGA
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The ADDER AV4PRO-VGA-QUAD is a VGA, QUAD Video, USB 4 port switch with USB True Emulation Technology. It is a is a professional grade KVMA switch delivering ultimate flexibility for users who wish to share a high resolution screen and modern USB peripherals between a multiplicity of computers.

The AV4PRO-VGA-QUAD is designed to enable four quad-head computers to be controlled from a single high resolution KVM console using high definition analogue VGA video links. The switch makes use of Adder's True Emulation technology which enables USB HID devices to be continuously emulated to each computer. This unique technology enables instantaneous and reliable hotkey switching whilst also supporting the extra keys and features of enhanced keyboards and mice. Furthermore, the AdderView includes two independently switchable USB 2.0 channels and an audio channel, giving the user the flexibility to attach selected peripherals to different computers. Models are available supporting single, dual, QUAD or quad head VGA.

  • Access up to four computers with one quad-display, keyboard and mouse
  • High definition VGA video up to 2K (2048 x 1080) for film post production or WQXGA (2560 x 1600) for medical imaging
  • USB keyboard & mouse with support for almost any keyboard and mouse, graphics tablet, jog shuttle, joystick, 3D explorer, etc.
  • USB 2.0 Hub (2-Port) with broad high speed device support
  • Stereo audio support via 3.5mm auxiliary jacks


Adder AV4PRO-VGA-QUAD Features

  • Adder AV4PRO-VGA-QUAD High Definition VGA with extended profile DDC EDID

    High Definition VGA with extended profile DDC EDID

    The AdderView Pro Multi Screen AV4PRO-VGA-QUAD features high resolution VGA video with extended profile DDC EDID. The extended DDC EDID profile ensures that the switched graphics card is always optimised to work with your screen. The VGA capabilities enable users to work at very high resolutions including WUXGA (1920 x 1200) or (1920 x 1440) for intensive applications such as medai/graphic design or detailed medical imaging.

  • Adder AV4PRO-VGA-QUAD supports modern keyboards & mice, graphics tablets, jog shuttles, joysticks, and 3D explorers.

    True USB 2.0 emulation

    Unlike most KVM switches, which only support the most basic keyboard and mouse features, Adder's revolutionary 'True Emulation' allows you to use the extra function keys, wheels, buttons and controls that are commonly found on modern keyboards and mice. You can also use any other USB interface device including graphics tablets, jog shuttles, joysticks, 3D explorers, and wireless bluetooth keyboard & mouse*.

  • Adder AV4PRO-VGA-QUAD - Independent USB & Audio device switching

    Independent USB & Audio device switching

    The AdderView Pro AV4PRO-VGA-QUAD includes two independently switchable USB 2.0 channels and an audio channel, giving the user the flexibility to attach selected peripherals to different computers. For example, use the KVMA console to work on one computer whilst your USB peripherals are connected to other computers and your speakers are playing music from yet another.

  • Adder AV4PRO-VGA-QUAD - transparent USB 2.0 Hub with broad high speed device support

    Broad High Speed device support - Transparent USB 2.0 Hub

    An integrated transparent 2-port USB 2.0 hub allows a vast range of USB devices can be connected to the AV4PRO-VGA-QUAD from non standard keyboard / mouse devices to flash drives, printers and scanners.

  • Adder AV4PRO-VGA-QUAD Fast & Reliable Switching

    Fast & Reliable Switching

    Country code reporting, extended DDC EDID profile and continuous keyboard and mouse emulation ensure faultless operation. The USB 2.0 switching action has also been carefully engineered to ensure maximum computer reliability when connecting and disconnecting USB devices.

  • Adder AV4PRO-VGA-QUAD channel selection via remote

    Channel selection options

    The AdderView Pro AV4PRO-VGA-QUAD can be switched using the front panel buttons, selectable keyboard hotkeys, 3 button mice, an On-Screen-Display (OSD), or using simple ASCII codes via serial RS232. Optionally, you can also use the RC4 remote switch to make your selection. These switching options allow you to rapidly reassign connected devices to any of the connected computers.

  • Adder AV4PRO-VGA-QUAD Multi-platform support

    Multi-platform support

    The AV4PRO-VGA-QUAD works with all known software and computer platforms, with PS/2, USB and Sun, including Windows (all), DOS, Linux, Unix, BSD, all Sun OS, all Mac OS, NetWare, etc.

  • Adder AV4PRO-VGA-QUAD - Plug and Play

    Plug and Play

    AdderView Pro KVM devices are delivered in a zero configuration state so you can plug them in and start working on them straight away. There is no need for drivers or software to be installed.

  • Adder AV4PRO-VGA-QUAD serial RS232 port for control, synchronisation and upgrade

    Serial RS232 port for control, synchronization and upgrade

    • Remotely switch AV4PRO-VGA-QUAD using simple ASCII codes
    • Integration with RS232 controlled power switches to provide a complete hard reboot function
    • Flash upgrade

  • Adder AV4PRO-VGA-QUAD as a 4-port 8-monitor, 7-monitor, 6-monitor, or 5-monitor KVM Switch

    Expand up to a 8-monitor KVM Switch

    AV4PRO-VGA-QUAD can be linked with another Adder AV4PRO unit to create up to a 4-port 5-monitor, 6-monitor, 7-monitor, or 8-monitor KVM Switching system, by using a VSC41 synchronisation cable.

AV4PRO-VGA-QUAD-US Package Contents

Adder AV4PRO-VGA-QUAD Package Contents

  1. (1) AV4PRO-VGA-QUAD KVM Switch
  2. (1) Power adapter (20W) and US-specific power lead
  3. (1) Quick start guide and Safety document
  4. (4) Self-adhesive rubber feet
  5. (1) 2-Year Limited Warranty & Lifetime World Class Support

Adder AV4PRO-VGA-QUAD Specifications

Height 3.94 in. (100 mm.)
Width 10.24 in. (260 mm.)
Depth 5.9 in. (150 mm.)
Physical Design2.5U high metal case
Hardware CompatibilityAll computers with USB interfaces
Software CompatibilityOperates with all known software and operating systems including Windows (all), DOS, Linux, Unix, BSD, all Sun OS, all Mac OS, NetWare etc.
Computer connections at switchUSB 2.0 type B, Hi Res VGA (up to 4 connections)
3.5mm stereo jack
Local KVM Console Connection Video 
Video4x VGA (Quad Monitor)
Keyboard/Mouse2 x USB type A
Switched USB 2 x USB 2.0 type A
Supports USB 2.0 devices in low, full and high speed models.
USB True EmulationEmulates keyboard and mouse on each port. Low speed HID USB 2.0 devices supported
Audio 3.5mm stereo jack
Other ConnectionsOptions (flash upgrade, sync with other AV4PRO-VGA-QUAD and RS232 triggered power switches): Modular 10P10C
Power2.5mm DC jack (power adapter included), 100-24-VAC 50/60Hz input to power adapter, 5VDC 2A output from power adapter
Operating Temperature0°C to 40°C / 32°F to 104°F
ApprovalsCE, FCC

The AV4PRO-VGA-QUAD is also known as AV4PRO-VGA-QUAD-US.

Question: My computers have DVI connections. My monitors have the 15 pin VGA connections. My cables are DVI on one side and 15 pin VGA connections on the other side so they should work. I recently returned a StarTech switch that was Quad for two computers. The problem was when my computers went to sleep they would lose their connection with the switch. And sometimes they would lose connections for no appearent reason. Also my wireless keyboard and mouse would not work. Will this switch not lose connection when the computer goes to sleep?? Will wireless keyboard and mouse work??
Answer: Any connected computer can go into sleep mode and be awakened (when its channel is selected) as soon as you press a key or move the mouse. The computer and peripherals must support the USB Remote Wakeup feature. So the short answer is that the switch will not lose connection when the computer goes to sleep.

As for the wireless keyboard and mouse, this feature cannot be guaranteed. Sometimes wireless works and sometimes it does not. It is not something that the manufacturers test and rate their switches for, but we have seen success in switches with integrated USB 2.0 hubs such as this one. But again, we cannot guarantee compatibility. Please note that you have 30 days to try out the product and return it if it does not meet your specifications. More details can be seen here:

You stated that you were converting signals as well. Please note that this is not always supported by KVM either. As you convert, signals are deteriorated and are not always recognized. The less you can convert the better and it is best to keep the original signal into the KVM and convert out of it. That being said, it would be a safer bet to go with a DVI KVM switch such as:

Question: i would like to use VGA Quad Monitor 4-Port USB KVM switch with Dell P4317Q which can display 4 CPUs in a single monitor. Is this doable ?
Answer: Thank you for your inquiry,

While the manufacturer does not specify support, and thus we are unable to guarantee compatibility, using the AV4PRO-VGA-Quad with the Dell P4317Q PIP monitor would be theoretically feasible. You would simply need to convert the output signals from the AV4PRO-VGA-QUAD to the monitor:
1x VGA - plug in VGA.
2x HDMI - convert VGA to HDMI with i.e. VGAA-HD-ULC.
1x DisplayPort - convert VGA to HDMI with i.e. VGAA-HD-ULC and then HDMI to DisplayPort with i.e. 54179.

Depending on what would be more convenient for your application, you could also use the AV4PRO-DVI-QUAD-US instead, with the following adapters:
1x VGA - DVI-I supports analog signals so you can just adapt it using DVI-I to VGA adapter i.e. VSA11
2x HDMI - Adapt DVI to HDMI with i.e. HDMIM-DVIDF or HDMIF-DVIDM - depending where you place the adapter (attached to end of cable / to monitor, or attached to the KVM before the cable, respectively)
1x MiniDP - Convert DVI to mDP with i.e. GTV-DVIDL-2-MDP

The monitor has a built in scaler that requires you to plug in 4 or 2 clients / inputs; as long as you have at least 2 active inputs that have the same resolution applied, the scaler shouldn't be an issue. The resolution also should not change when changing PIP modes, but if it does, the EDID emulator inside the AV4PRO should compensate (however, sometimes signal conversion does effect this abstractly).

Again due to the complexity of converting to multiple different signals, and lack of stated support, we cannot guarantee full compatibility / no loss in features.

For further help finding the ideal solution for your application, please feel free to contact your KVM Switches Online sales representative directly.

Question: I have 2 mini display port and 1 hdmi port out of this PC. Could I use a VGA adapter to connect?
Answer: Thank you for your inquiry,

The Adder AV4PRO-VGA-Quad should indeed work with video adapters for your application.

While adapter compatibility depends on the application a little bit, you should be able to use for example C2G 54300 Mini-DP to VGA adapters to support the 2x Mini-DP output, and a C2G 41350 HDMI to VGA adapter to support the 1x HDMI output.

Alternatively depending on your monitors video input and other sources video output, you may also be interested in the Adder AV4PRO-DVI-QUAD - same switch but based on digital DVI video. You can use for example NTI DPMM-DVIDF-CBL Mini-DP to DVI adapters to support the 2x Mini-DP output, and an Adder VSCD11 HDMI to DVI adapter to support the 1x HDMI output.

Please let us know if there is anything else we can help you with!