The Ergotron 45-690-290 LX Pro Dual Stacking Arm is a white dual-monitor desk mount designed for vertically stacked or flexible multi-monitor configurations. It supports two displays with a combined capacity of up to 44 lb (20 kg), with each monitor supporting 4–22 lb (1.8–10 kg).
Overview
The LX Pro Dual Stacking Arm uses two articulated arms mounted on a shared 12-inch (30.4 cm) pole. Each display can be positioned independently, allowing stacked monitor arrangements as well as other supported orientations within the arm's adjustment range.
Dual-Monitor Support
The 45-690-290 supports displays up to 27 inches in typical configuration. The important selection criterion is the weight rating: each monitor must remain within the 4–22 lb range, while the combined load must not exceed 44 lb.
Adjustability
The mount provides 13 inches (33 cm) of lift, 85° of monitor tilt, 360° of monitor rotation, and up to 360° of monitor pan. A rotation stop can be engaged to limit pan movement to 180°. The arms extend up to 25 inches (64 cm).
Desk Mounting
The standard two-piece desk clamp accommodates worksurfaces from 0.4–2.4 inches (10–60 mm) thick. The included 12-inch pole provides additional vertical mounting range for stacked displays.
Key Features
- Supports two monitors in a stacking configuration.
- Supports 4–22 lb (1.8–10 kg) per monitor and 44 lb (20 kg) total.
- Includes a 12-inch (30.4 cm) pole for dual-monitor positioning.
- Provides 13 inches (33 cm) of lift and up to 25 inches (64 cm) of extension.
- Supports VESA 75 x 75 mm and 100 x 100 mm mounting patterns.
VESA Compatibility
The 45-690-290 uses the VESA FDMI MIS-D, 100/75, C interface and supports 75 x 75 mm and 100 x 100 mm mounting patterns.
Applications
This dual stacking mount is suited to workstations requiring two adjustable displays while keeping the screens vertically organized. Ergotron's LX Pro modular system also supports additional monitor configurations using compatible expansion components.
DC Supplies Product Note
For a two-monitor installation, check both individual monitor weights and their combined weight before mounting. The 45-690-290 allows up to 22 lb per display, but the combined load must remain within the 44 lb total rating.
Specifications
| Specification | Details |
|---|
| Brand | Ergotron |
| Part Number / MPN | 45-690-290 |
| Product Type | LX Pro Dual Stacking Arm |
| Color | White |
| Monitor Configuration | Dual monitor, stacking |
| Typical Display Size | Up to 27 inches |
| Individual Monitor Capacity | 4–22 lb (1.8–10 kg) |
| Total Weight Capacity | 44 lb (20 kg) |
| Lift | 13 inches (33 cm) |
| Tilt | 85° (+70° / -15°) |
| Monitor Pan | 360° (180° with rotation stop engaged) |
| Monitor Rotation | 360° |
| VESA Standard | MIS-D, 100/75, C |
| VESA Mounting Patterns | 75 x 75 mm and 100 x 100 mm |
| Maximum Extension | 25 inches (64 cm) |
| Pole Height | 12 inches (30.4 cm) |
| Desk Surface Thickness | 0.4–2.4 inches (10–60 mm) |
| Mounting Type | Two-piece desk clamp |
| Product Weight | 16.2 lb (7.3 kg) |
| Warranty | 10 years |
| GTIN | 00698833091717 |
Package Contents
The package includes two arms, two extensions, two monitor pivots, a two-piece desk clamp, large base, 12-inch pole, two pole collars, and attachment hardware.
Frequently Asked Questions
How many monitors can the 45-690-290 support?
The LX Pro Dual Stacking Arm supports two monitors.
What monitor size is supported?
Ergotron specifies a typical display size of up to 27 inches for this dual stacking configuration, subject to the weight capacity.
What is the weight capacity?
Each monitor can weigh 4–22 lb (1.8–10 kg), with a total capacity of 44 lb (20 kg).
Can the monitors be positioned side by side?
The LX Pro Dual Stacking configuration is designed primarily for stacking, while Ergotron's modular LX Pro system provides separate side-by-side configurations and compatible expansion components for other multi-monitor arrangements.
What desk thickness does the included clamp support?
The standard two-piece desk clamp supports worksurfaces from 0.4–2.4 inches (10–60 mm) thick.
Which VESA patterns are supported?
The arm supports 75 x 75 mm and 100 x 100 mm VESA mounting patterns.
