Loctek D7D Dual Monitor Arm Premium Review: The Ergotron Alternative?

Loctek D7D Dual Monitor Arm Rating: 4.5/5 ⭐ Price: ¥359 (~$49 USD) Recommendation: ✅ Worth Buying

A good monitor arm transforms your desk ergonomics — freeing up desktop space, enabling perfect viewing angles, and keeping cables organized. The Loctek D7D (also known as the Loctek D7D Premium) is a gas-spring dual monitor arm that directly competes with the Ergotron LX Dual at less than one-third the price while offering comparable weight capacity and range of motion. With 15,000+ reviews on JD.com averaging 4.6 stars, the D7D has become the default recommendation for Chinese professionals needing a serious dual-monitor setup.

Specifications at a Glance

Feature	Loctek D7D	NB North Bayou H100	Ergotron LX Dual	Brateck D2D
Price	¥359 ($49)	¥279 ($38)	¥1,299 ($179)	¥299 ($41)
Weight Capacity	9kg per arm (18kg total)	8kg per arm	7kg per arm	8kg per arm
Monitor Size	17”–32” per arm	17”–30” per arm	17”–32” per arm	17”–30” per arm
Mount Type	C-clamp / Grommet	C-clamp / Grommet	C-clamp / Grommet	C-clamp / Grommet
Gas Spring	Yes (internal)	Yes (internal)	Yes (external)	Yes (internal)
Height Adjustment	Tool-free (gas spring)	Tool-free (gas spring)	Tool-free (gas spring)	Allen key required
Rotation	360° each arm	360° each arm	360° each arm	360° each arm
VESA Compatible	75x75 / 100x100	75x75 / 100x100	75x75 / 100x100	75x75 / 100x100
Desk Thickness	1–6cm	1–5.5cm	1–6cm	1–5cm
Cable Management	Built-in channel + covers	Built-in channel	Detachable covers	Built-in channel

Design and Build Quality

The Loctek D7D is constructed from thick-gauge steel with a matte black powder-coated finish that resists scratches and fingerprints. The two arm segments are asymmetrical — one is slightly shorter than the other to allow for staggered monitor positioning. Each arm is rated for 9kg (20 lbs) , and the gas spring mechanism is housed internally within the arm, giving it a clean, streamlined appearance free of external spring housings.

The mounting base uses a heavy-duty C-clamp with thick rubber padding to protect your desk surface. The clamp screw has a large plastic knob that allows for hand-tightening — no tools needed for installation. The base also supports grommet mounting for desks with cable holes. The column pole is thick (3.2cm diameter) and provides a sturdy central pivot point.

One notable design detail is the tool-free gas spring adjustment. Each arm has a small hex key hole for adjusting gas spring tension — you turn a set screw to increase or decrease the spring force to match your monitor’s weight. This is much easier than competitors that require partial disassembly (looking at you, Brateck). Once set correctly, the arm holds position perfectly with zero drift over time.

💡 “The D7D build quality is a full tier above the NB H100 — thicker steel, more stable clamp. Once the gas spring is adjusted, it’s very smooth — I can reposition my 27-inch monitor with one hand. ¥359 is incredible value.”

Performance and User Experience

Range of Motion

Each arm of the D7D offers an impressive range of motion: 360° rotation at the base, 180° arm articulation, ±15° tilt, and 90° portrait-to-landscape pivot. The vertical travel range is approximately 25cm per arm. Combined, two arms can be positioned in virtually any configuration — side by side, stacked, one centered with one to the side, or angled inward for a wraparound feel. The arm reach extends 45cm from the mounting pole measured horizontally.

Gas Spring Adjustability

Setting up the D7D’s gas spring requires a few minutes of adjustment. You need to:

1. Mount the arm and attach your monitor
2. Loosen the tension screw if the arm rises too slowly (or tighten if it drops)
3. Test the movement in several positions

Once dialed in, the arm holds its position flawlessly. The internal gas spring is rated for 50,000+ cycles and uses a high-quality nitrogen cartridge. Users report no sagging even after 12+ months of daily adjustment.

Cable Management

The built-in cable management channels run along the full length of both arms. The snap-on plastic covers hide cables effectively, though they can be fiddly to reattach once cables are routed. The channels are wide enough for most monitor cables but can get tight with thicker cables or if you’re running multiple cables through a single arm. A single cable run per arm is ideal.

💡 “Been using for over a year, two 27-inch monitors mounted very stable. The damping adjustment works well — after tuning, lift and lower freely. Cable management channel is well designed, desktop is much cleaner. Only downside is the base takes up some desk space.”

What Chinese Users Say

User Ratings (Aggregated from JD.com): Overall 4.6/5 ★ (15,200+ reviews)

Quote 1 — 王* ⭐⭐⭐⭐⭐** 💡 “Compared many domestic and international mounts, finally chose the Loctek D7D. Great quality, thick steel, simple installation. Dual monitors easily adjusted to optimal angles, much better for cervical spine. Much cheaper than Ergotron but comparable quality.”

Quote 2 — 陈* ⭐⭐⭐⭐** 💡 “Overall satisfied, load capacity and stability are both great. Minus one star because gas spring tuning requires patience to fine-tune, and the instructions aren’t detailed enough. After installation, make sure all screws are tightened or there will be slight wobble.”

Quote 3 — 孙* ⭐⭐⭐⭐⭐** 💡 “Bought this for the third time — equipped D7D in both office and home. Stability is top-tier among all domestic brands. Good VESA compatibility — Dell, ASUS, and AOC monitors fit easily. Highly recommended.”

Quote 4 — 周* ⭐⭐⭐⭐** 💡 “Compared to the NB H100, the D7D has thicker steel and smoother gas spring adjustment. But it’s ¥80 more expensive. If budget is tight, H100 is sufficient. With a bit more budget, the D7D provides a better experience.”

Pros and Cons

Pros	Cons
9kg per arm capacity — supports large monitors up to 32”	Gas spring tuning requires patience and multiple tries
All-metal construction with thick steel	Base takes up significant desk space behind the desk edge
Tool-free gas spring adjustment (hex key)	Cable covers can be fiddly to snap back on
Full 360° rotation + 180° articulation on each arm	Instructions are not very detailed
Built-in cable management channels	Taller monitors may hit the ceiling in limited vertical clearance
Stability is excellent — very little wobble	Requires a desk with at least 6cm overhang for C-clamp
Much cheaper than Ergotron LX Dual with similar quality	Slightly more expensive than budget Chinese alternatives

FAQ

1. Will the Loctek D7D support my 32-inch monitor?

Yes, as long as your monitor weighs less than 9kg per arm. Most 32-inch monitors are 6–8kg without the stand, so they fit within spec. Always check your monitor’s weight (excluding its original stand) before purchasing.

2. Is installation difficult?

Assembly takes 15–25 minutes and requires only a Phillips head screwdriver. The C-clamp mounts easily. The main time investment is tuning the gas spring tension — this can take another 10 minutes of trial and adjustment.

3. How does the D7D compare to the NB North Bayou H100?

The D7D is clearly superior — thicker steel, higher per-arm capacity (9kg vs 8kg), smoother gas spring, and better cable management. The H100 is a good budget pick at ¥279, but the D7D’s ¥359 price difference is well justified.

4. Can I use the D7D with a curved monitor?

Yes. The D7D’s VESA plate supports standard 75x75mm and 100x100mm patterns, which modern curved monitors use. The gas spring holds curved monitors securely at any angle.

5. Will the arm wobble when I type?

Minimal wobble. The heavy-duty steel construction and secure C-clamp mounting keep arm movement to a minimum. At maximum extension there is slight vibration, but it’s not visible during normal use.

Verdict and Rating

The Loctek D7D is the best value dual monitor arm in its price class, offering premium build quality, excellent gas spring mechanics, and strong stability at a price that beats the Ergotron LX Dual by 70%.

Score Breakdown:

• Build Quality: 4.5/5 — Thick steel, quality powder coating, durable
• Range of Motion: 4.5/5 — Full articulation, gas spring is smooth when tuned
• Stability: 4.5/5 — Excellent for home office use, very little wobble
• Ease of Setup: 4.0/5 — Straightforward installation, gas spring tuning is fiddly
• Value: 5/5 — ¥359 is exceptional for this quality level

Overall: 4.5/5 ⭐

Recommendation: ✅ Worth Buying

The Loctek D7D proves you don’t need to spend Ergotron money for a premium monitor arm experience. With robust construction, smooth gas spring adjustability, and excellent cable management, it is the default recommendation for any dual-monitor setup on a budget.

Who should buy:

• Dual-monitor users wanting desk space back
• Anyone with 24”–32” monitors (up to 9kg each)
• Those considering the Ergotron LX Dual but balking at the price

Who should look elsewhere:

• Budget buyers (the NB H100 at ¥279 is a decent alternative)
• Single monitor users (the single-arm D7 or Brateck E350 is cheaper)
• Users needing extreme stability for heavy monitors (>9kg each)