audio-sound @ hatena

An audio review & news blog. The volume should not exceed 80 dB is recommended. I usually adhere to the safe-listening style by WHO. Please note that my aural impressions and interpretations of measurements are also made from a safe-listening style.

(Chi-fi IEM Review) Moondrop CHU: The entry class IEMs of uncompromising brands is a bit different

Moondrop CHU

Moondrop CHU




  • This review is written based on a "private purchase" or "product rented for a price".
  • No remuneration or compensation, such as a manuscript fee, has been received for publishing this, and it is an honest evaluation based on measurement data from personal testing and personal opinion.
  • Please read the privacy policy of this website.


  • Those looking for a good monitor earphone
  • Those who like a well-balanced sound
  • People who are particular about the depth of low frequencies
  • People who are particular about overtone expression
  • Classic/JAZZ fan
  • People who value cost performance


Overview of Moondrop CHU

This review will give an overview of Moondrop CHU. A complete review of this product can be found here.


audio-sound Score

  • Total Score: 9.6 / 10.0
  • Package: 8.5 / 10.0
  • Build quality: 8.5 / 10.0
  • Fitment: 8.5 / 10.0
  • High range: 9.5 / 10.0
  • Mid range: 10.0 / 10.0
  • Low range: 10.0 / 10.0
  • Less distortion: 9.0 / 10.0


  • Want to see the score ranking? Click here!


Basic Specifications
  • Frequency response: 10Hz to 35kHz
  • Impedance: 18Ω
  • Sensitivity: 120dB/Vrms
  • Cable connector: N/A



The package is above the standard price.


Package contents
  • Moondrop CHU
  • Eartips
  • carrying case
  • Ear guide
  • Manuals


Moondrop CHU
Moondrop CHU

Moondrop CHU


Build quality

Build quality meets price standards. Re-cable is not possible.




The fit is quite good.



Sound quality

REW Frequency Response


Sound quality description

In this review, I use the standard eartips size L and drive it with the FiiO M15.


Moondrop CHU has a neutral sound with an emphasis on the midrange. It is also excellent in the depth of the low range, and it can express a profound feeling relatively well.


Please see here for detailed reviews on sound quality.


Sound quality general comment
  • Original Sound Fidelity: A+
  • Recommendation: S
  • Personal preference: S+


The CHU's sound near the top of the range of Moondrop products I have heard, and especially their sound balance has never sounded better.


How do they compare to the KATO's? The KATO is very superior in audio specs, and even considering their superior nozzle system and build quality, I would have to say that the KATO is the better earphones from a reviewer's perspective.


However, for my personal taste, I would say CHU. I guess it's the difference in low frequency range. I think KATO is more extended in the high frequency range, and it is hard to say whether it is better or worse. I am surprised at Moondrop's uncompromising quality in making CHU, which is supposed to be an entry-level product.



Sound quality features
  • Almost perfect texture
  • Good sound balance
  • Bright midrange
  • Lush
  • High resolution
  • Excellent low frequency depth
  • Good clarity
  • Near perfect monitor speaker sound
  • Excellent sound image consistency
  • High transparency
  • Frontally localized
  • Excellent coherence and overtone resonance


  • Lacks airiness
  • Slightly noisy upper midrange
  • Sound a little too clear for relaxed listening
  • Lacks subtlety


General comment

Moondrop CHU is an entry-level Chinese iems that could be called a "KATO the Younger," created with the knowledge gained from KATO. While the quality is kept in line with the price, the development results obtained from the latest models have been steadily introduced, and some of the improvements have even been made.


Moondrop CHU

Moondrop CHU
Moondrop CHU