Secretlab Magnus Monitor Arm (Heavy Duty) vs Ergotron LX Desk Monitor Arm
Two of the monitor arms in our best monitor arms: ergotron, uplift, secretlab, vari & haworth comparison, lined up spec by spec. Every figure comes from the manufacturer pages linked below, and the scores use the same published formula as the full ranking.
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Best for: For 34–57" screens up to 35.2 lb
Check price at AmazonBest for: The classic arm: 25 lb, 13" of lift
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | Secretlab Magnus Monitor Arm (Heavy Duty) | Ergotron LX Desk Monitor Arm | Weight |
|---|---|---|---|
| Max monitor weightThe top of the maker's rated weight range. Heavier ultrawides and 32"+ monitors need more. | 35.2 lb | 25 lb | 35% |
| Max screen sizeThe largest diagonal the maker rates the arm for. Ergotron notes weight matters more than size. | 57 in | 34 in | 15% |
| Height adjustmentTotal up-and-down travel. Where a maker gives a low and high point, we subtract. | 10.4 in | 13 in | 20% |
| ReachHow far the arm extends from its post; more reach lets you pull the screen closer or push it back. | 20.9 in | 25 in | 15% |
| WarrantyYears of coverage. Lifetime scores the same as 15 years. | Not listed | 10 yr | 15% |
| Weight range | 8–16 kg (17.6–35.2 lb) | 7–25 lb (3.2–11.3 kg) | info |
| Screen | 34"–57" | Not listed | info |
| Height range | 195–460 mm (10.4" travel) | Not listed | info |
| Reach | 530 mm (20.9") | Not listed | info |
| Warranty | Not published by the maker | Not listed | info |
| Typical screen | Not listed | Up to 34" | info |
| Lift | Not listed | 13" (33 cm) | info |
| Extension | Not listed | 25" (64 cm) | info |
| ErgoPick score | 5.9/10 | 5.8/10 | 100% |
Where each one comes out ahead
Secretlab Magnus Monitor Arm (Heavy Duty)
Better published figure on: Max monitor weight, Max screen size.
What we like
- Top max screen size in this comparison (57 in)
Watch out for
- Warranty not published by Secretlab
Ergotron LX Desk Monitor Arm
Better published figure on: Height adjustment, Reach.
What we like
Watch out for
Verdict
On published specs, the Secretlab Magnus Monitor Arm (Heavy Duty) scores higher (5.9 vs 5.8). Specs don't capture sound character or feel, so weigh the pros and cons above too.
- Choose the Secretlab Magnus Monitor Arm (Heavy Duty) if this sounds like you: for 34–57" screens up to 35.2 lb.
- Choose the Ergotron LX Desk Monitor Arm if this sounds like you: the classic arm: 25 lb, 13" of lift.
- Secretlab Magnus Monitor Arm (Heavy Duty): Secretlab: Magnus Monitor Arm (Heavy Duty)
- Ergotron LX Desk Monitor Arm: Ergotron: LX Desk Monitor Arm spec sheet