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) TRN XuanWu: With deep, heavy bass and calm, atmospheric dark midrange

TRN XuanWu




  • This review is based on "private purchases" or "items rented for a consideration".
  • 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.


  • People who value low-frequency depth
  • People who like darker sound


Overview of TRN XuanWu

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


audio-sound Score

  • Total Score: 8.7 / 10.0
  • Package: 8.0 / 10.0
  • Build quality: 8.5 / 10.0
  • Fitment: 8.5 / 10.0
  • High range: 8.0 / 10.0
  • Mid range: 8.5 / 10.0
  • Low range: 10.0 / 10.0
  • Less distortion: 8.0 / 10.0
  • Cost performance bonus: 10.5 / 10.0


  • Want to see the score ranking? Click here!


Basic Specifications
  • Frequency response: 20Hz to 20kHz
  • Impedance: 12Ω
  • Sensitivity: 117dB
  • Cable connector: 2pin


Features of TRN XuanWu

  • The Name XuanWu Comes From The Four Symbols Of Chinese Astronomy
  • Exclusive 10mm Square Planar Driver
  • Compact and Durable
  • 4 Core Stranded Cable
  • Groundbreaking and Revolutionary Driver


Immortality and Eternity

The name XuanWu comes from the Four Symbols of Chinese astronomy. The XuanWu, or the Black Tortoise (a.k.a. "Black Warrior") is actually a tortoise entwined together with a serpent, representing the combination of movement and stillness, or the yin and yang. It is the symbol of winter and the domination of the northern sky. It also represents the lifecycle and harmonization of the universe.


TRN XuanWu


Square Planar Driver

Developed and manufactured by Bellsing, this distinctively new and exclusive 10mm square planar driver contribute to the powerful bass and warm vocal, perfect for daily music listener. By combining the strength of dynamic driver and conventional planar drivers, the Bellsing driver is a master in maintaining the harmony of all frequencies, which is a rare contribution among planar driver headphones.


TRN XuanWu


Compact and Durable

Made of Aluminum alloy faceplate and semi-permeable resin shell, the TRN XuanWu is a perfect example of simplicity and quality. The metallic case is not only durable but looks classy and premium.


TRN XuanWu


4 core stranded cable

TRN XuanWu uses 4 core cables made of pure copper and silver-plated copper, which has the advantage of both types of copper cable, making the output sounds wider. As the resolution increases, the audio output is richer with details. Connectors is available in 3.5mm, 2.5mm, and 4.4mm that is gold-plated.


TRN XuanWu


Groundbreaking and Revolutionary Driver

The innovated Bellsing driver of TRN XuanWu makes it possible for planar magnetic driver to be used on headphones and not just the bulky speaker and amplifiers that require great power to drive. The TRN XuanWu only has a 12Ω impedance, even a smartphone could drive it excellently.


TRN XuanWu



Package meets price standard. The package is simple and easy to dispose of.


Package contents
  • TRN XuanWu
  • Eartips
  • Manuals


TRN XuanWu

TRN XuanWu

TRN XuanWu

TRN XuanWu

TRN XuanWu

TRN XuanWu

TRN XuanWu


Build quality

Build quality meets the price standard.


TRN XuanWu

TRN XuanWu

TRN XuanWu
TRN XuanWu
TRN XuanWu
TRN XuanWu

TRN XuanWu



The fit is good.


TRN XuanWu

TRN XuanWu
TRN XuanWu
TRN XuanWu


Sound quality

REW Frequency Response

TRN XuanWu


audio status

TRN XuanWu


Sound quality description

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


TRN Xuan Wu has a sound signature with an emphasis on mid-high and low frequencies.


Please see here for detailed reviews on sound quality.


TRN XuanWu


Lows / Bass

The low frequencies of the TRN XuanWu extend well into the quite deep range and can achieve quite a sense of realism.


Drum kicks have plenty of impact and a fair amount of weight, and rumble is of a satisfactory level.


Electric bass also sounds black and well-spaced.


It can be said to be well balanced with the midrange in terms of presence, and can be highly recommended for low-frequency enthusiasts.


TRN XuanWu



The midrange of the TRN XuanWu is fairly close to neutral, but the upper midrange is emphasized and generally forward.


However, the edges are a bit poor, so the midrange tends to sound dull with a poor sense of construction. Guitar edges lack color, and the snare tends to sound bobbly or lumpy.


The vocals are also a bit nasal, the consonants are not very articulate, and the voice tends to be a bit husky. It tends to sound a little fluffy, and has a sense of being comfortable in the ear, but impressively lacks liveliness and tends to sound a little dark. It is easy to get the feeling that there is not enough spotlight on the vocals, and it sounds as if the singer is singing in a dark position, and many may think that the focus is not good.


TRN XuanWu


Highs / Treble

High frequencies are lacking in extension. Overall, the highs are lacking in energy, and the brightness is a bit low, but the definition is not bad, so there is probably no shortage of detail.


It sounds a little superior in delicacy, with a fairly safe high frequency range and a little emphasis on the highs. However, the airiness is lacking, so the diffuse spread of hi-hats and cymbal crashes is poor, and the woodwinds and violins are not very exhilarating with poor extension.


TRN XuanWu


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


If you are a fan of low frequencies and like a chic and classy atmosphere where you can enjoy vocals in a slightly darker atmosphere, TRN XuanWu may not be a bad choice. The original sound fidelity is not bad, and the overall balance is not bad either.


Nevertheless, for a low-frequency model around the same price, the FloAudio Calla, for example, seems to be generally superior.


TRN XuanWu:


Sound quality features

  • Good texture
  • Good original sound fidelity
  • Heavy, deep bass
  • Elegant and chic
  • Resolution above price


  • Insufficient high frequency extension
  • Poor coloration
  • Sound a little too rounded, lacks a sense of construction
  • Dark midrange
  • Overall subdued sound


General comment

The TRN XuanWu is an IEMs with a massive, deep low frequency range and a chic, classy, dark-sounding midrange. It is not a particularly outstanding IEMs in its price range, considering its sound performance and overall package, but if you like low frequencies, you will find it quite appealing, and it is a good candidate.


TRN XuanWu

TRN XuanWu

TRN XuanWu