Adder AV4PRO-VGA-Quad
Expert rating7 / 10
- Computers:
- 4
- Monitors:
- 4
- Video Standard:
- VGA
- USB Hub Ports:
- 2
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Manufacturer: Adder Technology Last updated: September 12, 2026
Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00) Review
The Adder AV4PRO-VGA-Quad is a full four-head analog VGA KVM switch for 4 computers and 4 monitors, discounted to $900.90 from $1001.00.
This tops out Adder's VGA head-count ladder at four monitors, for legacy trading desks or control rooms that need every display switched but haven't moved to digital video yet. It's priced noticeably below its DVI counterpart, the AV4PRO-DVI-QUAD, reflecting the lower cost of analog VGA components even at this maximum head count.
Full Quad-VGA Switching
All four analog VGA monitors move together between the four connected computers, a legacy-friendly option for fleets that haven't upgraded to digital displays.
The Ceiling of the Analog AV4PRO Line
Four heads is as far as this VGA family goes; installations needing more monitors or digital video should look at the DVI-QUAD variant or a matrix system instead.
Comparison to Alternatives
Versus the Adder AV4PRO-DVI-QUAD — that's the digital DVI version at a higher price, worth it for sharper image quality. Versus the Adder AV4PRO-VGA-Triple — that drops to three heads at a lower price, worth it if a fourth monitor isn't needed.
Specifications
Design
| Port Count | 4 |
|---|---|
| Switching Method | Front-panel buttons, keyboard hotkeys, three-button mouse, RS232 ASCII codes, optional RC4 remote |
Topology
| Computers Supported | 4 computers |
|---|---|
| Displays Per Computer | 4 displays |
| Video Path Type | Independent heads |
| KVM Segment | Desk |
Video & Features
| Video Standard | VGA |
|---|---|
| USB Hub Ports | 2 |
| Audio Support | Yes |
Video interface
| Video Connector | VGA |
|---|---|
| Video Interface Version | VGA |
USB peripheral switching
| USB Switching Speed | USB 2.0 |
|---|---|
| Shared USB Ports | 2 ports |
| Dedicated HID Ports | 2 ports |
| HID Emulation | Yes |
Switching control
| Button Switching | Yes |
|---|---|
| Hotkey Switching | Yes |
| Mouse Or Cursor Switching | Yes |
| Serial Or Network Control | RS232 |
Audio
| Analog Audio Jacks | Yes |
|---|
Physical and power
| Rack Mountable | Yes |
|---|---|
| External Power Required | Yes |
In the box and price
| Price | 900.90 USD |
|---|
| Brand | Adder |
|---|---|
| Model | AV4PRO-VGA-Quad |
| Source URL | https://www.adder.com/sites/default/files/2023-05/av4pro_vga_ms_v4_web.pdf |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating7 / 10
The most capable analog VGA option here for a legacy quad-monitor, four-computer trading desk.
Best for
- Legacy quad-monitor trading or control-room desks still on VGA
- Facilities not ready to invest in digital monitor upgrades
- Buyers who want the maximum head count in Adder's analog line
Not for
- Modern digital monitor fleets (the DVI-QUAD looks sharper)
- Triple-monitor or smaller setups (the Triple variant is cheaper)
- Anyone needing HDMI or DisplayPort output
FAQs
What are the key specifications of the Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00)?
The Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00) is a KVM switch from Adder Technology. Key specs: Port Count 4 computers, 4 monitors, Switching Method Button, hotkey, RS232, Video Standard VGA, Max Resolution 1920x1200 per head, USB Hub Ports 2.
Who is the Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00) best suited to?
It suits legacy quad-monitor trading or control-room desks still on vga, facilities not ready to invest in digital monitor upgrades, buyers who want the maximum head count in adder's analog line.
What are the drawbacks of the Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00)?
It is a poor fit for modern digital monitor fleets (the dvi-quad looks sharper), triple-monitor or smaller setups (the triple variant is cheaper), anyone needing hdmi or displayport output.
Compare and read more
- Adder AdderLink IPEPS (IPEPS) (1 Server / IP-Based Remote KVM over IP / Single-Port Extender) vs Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00)
- Adder ADDERView PRO (AV4PRO-DVI) (4 Computers / DVI / Secure Desktop KVM / $540.00) vs Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00)
- Adder ALIF1002P (Network DVI Extender Transmitter & Receiver / $3,051.40) vs Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00)
- Adder ALIF1104T (HDMI KVM-over-IP Transmitter over 1GbE / $1,201.75) vs Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00)
- Adder AdderView PRO AV4PRO (4-8 Computers / 1-4 Monitors / DVI-VGA / Modular Multi-Head) vs Adder AV4PRO-VGA-Quad (4-Port / 4 Monitors / VGA Quad-Head KVM / $900.90, was $1001.00)