This is a comparison that trips people up because of naming alone. Moondrop makes a dongle DAC/amp lineup and also has separate in-ear monitor lines, and the “Lan” name actually belongs to the IEM side of the family, now in its second generation as the LAN II, not a dongle DAC as the name might suggest to newcomers browsing the catalog. Once that’s cleared up, comparing it to the Chu 2 is a straightforward apples-to-apples IEM matchup.
Clearing up what the Lan II actually is
The Moondrop LAN II is an in-ear monitor built around a 10mm Glass Dome Composite Diaphragm dynamic driver with a dual magnetic circuit, sold in two tuning variants: LAN II Pop, which leans warmer and more bass-forward, and LAN II Ref, which is tighter and more mid-high focused. It is not related to Moondrop’s separate MoonRiver dongle DAC/amp lineup, despite both being small USB-adjacent audio products in Moondrop’s broader catalog.
- 10mm Glass Dome Composite Diaphragm dynamic driver, dual magnetic circuit
- Impedance: 30Ω ±15% at 1kHz
- Sensitivity: 118dB/Vrms at 1kHz
- THD: ≤0.08% at 1kHz, 94dB
Driver philosophy: single dynamic vs single dynamic, different tuning
Interestingly, both the Chu 2 and LAN II use single dynamic driver designs, so this comparison comes down almost entirely to tuning and diaphragm material rather than driver count. The Chu 2 uses an Aluminum-Magnesium alloy composite diaphragm tuned for Moondrop’s familiar smooth VDSF-style curve. The LAN II’s Glass Dome Composite Diaphragm, especially in the Ref variant, pushes for tighter, more controlled bass and a slightly more resolving midrange and treble at the cost of a bit of the Chu 2’s easy warmth.
Sound comparison
On the same tracks, the Chu 2 sounds a touch warmer and more relaxed, which makes it very easy to listen to for hours without fatigue. The LAN II Ref variant, in particular, resolves fine detail slightly better and has a tighter, quicker low end thanks to its glass dome diaphragm technology, but the tradeoff is a marginally less forgiving treble on poorly mastered recordings. The LAN II Pop variant splits the difference, adding back some bass warmth closer to what Chu 2 owners are used to.
| Spec | Moondrop Chu 2 | Moondrop LAN II |
|---|---|---|
| Driver | 10mm dynamic, Al-Mg alloy diaphragm | 10mm dynamic, Glass Dome Composite diaphragm |
| Impedance | 18Ω | 30Ω |
| Sensitivity | 119dB/Vrms | 118dB/Vrms |
| Tuning variants | Single tuning | Pop (warm) and Ref (tight/detailed) |
Which should you buy
If you want a proven, easygoing tuning at a lower price, the Chu 2 remains hard to beat. If you want a bit more resolution and don’t mind paying more for a choice between two distinct tuning variants, the LAN II is worth the step up, especially the Ref variant for critical listening.
Why the naming confusion happens so often
It’s worth spending a moment on why this mix-up is so common, since I see it in reader questions regularly. Moondrop’s product catalog spans in-ear monitors, dongle DACs, a CD player, and true wireless earbuds, and naming conventions don’t always cleanly separate categories at a glance. The “Lan” name specifically belongs to the wired IEM line, now on its second generation, while dongle DACs live under names like Dawn and MoonRiver. If you’re shopping and see “Moondrop Lan” or “Lan II” listed next to dongle DACs in a retailer’s product grid, don’t assume it’s plug-and-play digital hardware — check the product page specs before buying to confirm you’re getting an IEM, not a USB accessory.
Choosing between the LAN II Pop and Ref variants
If you do decide the LAN II is the right step up from the Chu 2, you’ll then face a second decision: Pop or Ref. The Pop variant keeps more bass warmth and is the easier recommendation if you’re coming directly from the Chu 2’s tuning and don’t want too dramatic a shift in overall balance. The Ref variant leans tighter and more mid-high focused, better suited to listeners who specifically want more resolution and don’t mind trading away some of that bass warmth to get it. Neither is a wrong choice, but knowing your own listening priorities beforehand will save you from picking the wrong variant and needing to swap later.
Frequently asked questions
Is the Moondrop LAN II a dongle DAC or an in-ear monitor?
It’s an in-ear monitor, not a dongle DAC. The Lan name is shared with Moondrop’s separate dongle DAC lineup naming conventions, which causes some confusion, but the LAN II itself is a wired IEM.
What’s the difference between LAN II Pop and LAN II Ref?
Pop is tuned warmer and more bass-forward, while Ref focuses on tighter bass control and enhanced mid-high clarity.
Is the LAN II a big upgrade from the Chu 2?
It’s a meaningful step up in resolution and diaphragm technology, but the Chu 2’s smoother, more relaxed tuning still has its own appeal depending on your listening preferences.
Do both need extra amplification?
No, both are efficient single dynamic driver designs that work fine from a phone or basic USB-C dongle.
Cable and accessory differences
Both ship with a detachable cable and a set of silicone eartips, though the LAN II’s accessory kit leans slightly more premium given its higher price point, often including a nicer carrying case and a wider range of tip sizes to help dial in the seal for either the Pop or Ref variant’s intended tuning. Neither requires additional accessory purchases to sound its best out of the box, which is a nice change from some competing products that seem to hold back a proper tip selection to encourage separate accessory purchases.
Final thoughts
Once you get past the naming confusion, the Chu 2 vs LAN II comparison is a genuinely useful one for anyone deciding how much to spend on their next single-dynamic-driver IEM. The Chu 2 remains the value champion, while the LAN II rewards listeners willing to spend a bit more for tighter, more resolving sound.
About the author: I keep a running spreadsheet of IEM specs mostly so naming mix-ups like this one don’t catch me off guard mid-review.