Ergotron LX Vertical Stacking Dual Monitor Arm, VESA Desk Mount – for 2 Monitors Up to 40 Inches, 7 to 22 lbs Each – Tall Pole…
Best for
Best stacked / over-under
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$529.00
Updated Jun 27, 2026 · 1 min read
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Ergotron LX Vertical Stacking arm is the go-to answer for an over-under configuration on a tall pole, supporting two monitors up to 40" at 7–22 lbs each. As with the side-by-side LX, this listing did not carry its own expert or community signals in our data, so the synthesis leans on its 4.6-star verified-purchase rating across roughly 1,543 ratings. The stacked layout suits narrow desks or users who want a secondary display mounted above the primary rather than beside it.
What reviewers liked
- Strong 4.6-star verified-purchase rating across ~1,543 ratings
- Supports large panels up to 40" at up to 22 lbs per arm
- Stacked over-under layout ideal for narrow desks or a display above the primary
- Tall-pole design from a brand widely cited for durability
Where it falls short
- No dedicated expert or community signals in the supplied data for this listing
- Premium price well above budget stacking mounts
- Stacked configuration requires clearance and careful leveling
- Over-under layout is a niche fit rather than a universal choice
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Across the reviewers we read, the Ergotron LX Vertical Stacking arm is the go-to answer for an over-under configuration on a tall pole, supporting two monitors up to 40" at 7–22 lbs each. As with the side-by-side LX, this listing did not carry its own expert or community signals in our data, so the synthesis leans on its 4.6-star verified-purchase rating across roughly 1,543 ratings.
The stacked layout suits narrow desks or users who want a secondary display mounted above the primary rather than beside it. Reviewers of stacked arms generally caution that the tall pole needs adequate clearance and that getting both monitors leveled takes patience, considerations that apply to this configuration in particular.
The trust-weighted read is a capable, well-rated mount for a specific need, carrying the same premium pricing as the rest of the LX family and the same caveat that our data lacked granular independent testing for this exact SKU.
- Broad compatibility
- Fits two screens up to 40 inches and 7 to 22 pounds each; compatible with VESA patterns 75x75mm and 100x100mm
- Everything you need
- Includes two LX arms and extensions, 23-inch pole, heavy duty two-piece desk clamp for surface edges 0.63 to 2.6 inches thick, grommet mount plate and hardware for installation through a desktop hole, two pole collars, two caps and mounting hardware
- Comfortable workspace
- Find your best view for each project with 13 inches of lift, rising 31.7 inches from the desktop; customize how you work or collaborate at your workstation with 360 degrees of rotation and 75 degrees of tilt
- Flexible working
- Easily stack screens one over the other or position to either side; up your screen count and productivity with three or four displays using the LX Arm, Extension and Collar Kit accessory (98-130-224); free up more of your worksurface with thoughtful cable management
- Built to last
- Extensive quality testing ensures your display stays stable and secure; Ergotron products set the standard for quality with a 10-year warranty and expert technical support
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