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Black in-ear monitors with metal shells and detachable 3.5 mm cable

Moondrop CHU II 10 mm dynamic IEM black 3.5 mm 18 ohm 119 dB 3.87 oz

SKU CH-W3W6-C57E4

In-ear headphones with a 10 mm dynamic driver, 18 ohm impedance, 119 dB sensitivity and a replaceable brass nozzle

  • Driver size10 mm
  • Headphone styleIn Ear
  • Impedance18 ohms
  • Signal-to-noise ratio119 decibels
  • Audio sensitivity119 decibels
  • Connection3.5 mm
  • 10 mm dynamic driver delivers detailed sound across the frequency range
  • 18 ohm impedance allows easy pairing with phones and portable players
  • 119 dB sensitivity provides loud, clear output from low-power sources
  • Replaceable brass nozzle filters let you tune the signature without tools
  • Aluminum-magnesium alloy dome diaphragm keeps distortion below 0.05 %

Aluminium-magnesium dome driver IEM

The CHU II uses a 10 mm dynamic driver with an aluminium-magnesium alloy dome and dual-polymer suspension. The design targets ultra-low nonlinear distortion below 0.05 percent across the full frequency range for natural timbre and fine detail retrieval.

3.5 mm wired connection limits

A fixed 3.5 mm plug delivers an analogue signal directly from the source device without wireless compression or battery dependence. The 18 ohm load and 119 dB sensitivity allow high volume from portable players, though output impedance of the source can affect frequency response.

Replaces single-filter budget IEMs

Swappable brass acoustic nozzles let the user change tuning filters instead of buying multiple pairs. The alloy casting cavity adds structural rigidity over plastic shells, making the upgrade worthwhile for listeners who want adjustable sound signatures without carrying separate in-ear monitors.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $36.99
Pricier than about 62% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand nameMoondrop
Product line2
Model nameCHU II, MOONDROP-CHU-II
Part numberMOONDROP-CHU-II
Product typeIn-Ear
Product colorBlack
Audio & video
Driver size10 mm
Headphone styleIn Ear
Impedance18 ohms
Signal-to-noise ratio119 decibels
Audio sensitivity119 decibels
Wearing styleSingle Ear
Noise cancellationNone
Mic impedance18 ohm
Mic signal-to-noise ratio119 decibels
Mic sensitivity119 decibels
Ports & slots
Connection3.5 mm
Power
Charging time15 h
Size & build
Cord lengthProtective Case
Product weight3.87 oz
In the box
In the boxCHU II * 1, Cable, Protective Case, Eartip

Questions about this item

How do I decide between the 10 mm driver and other IEM driver sizes?

The 10 mm dynamic driver uses an aluminum-magnesium alloy dome diaphragm with a dual-polymer suspension, which extends treble bandwidth and tightens bass while keeping distortion below 0.05 %.

What does the 119 dB sensitivity mean when I plug these into my phone?

At 119 dB sensitivity and 18 ohm impedance, the CHU II reaches loud volumes from a standard 3.5 mm headphone jack without needing a separate amplifier.

What does the 3.5 mm connector cap in real use?

The 3.5 mm plug limits you to analog wired sources; it cannot carry a digital signal or inline remote power, so volume and playback controls depend on the host device.

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