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) BQEYZ Summer: A fairly well-balanced neutral sound. The midrange sounds lush and natural.

BQEYZ Summer

BQEYZ Summer




  • 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.
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  • People who like natural textured sounds
  • People who like the fresh midrange
  • People who value the transparency of sound


Overview of BQEYZ Summer

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


audio-sound Score

  • Total Score: 9.4 / 10.0
  • Package: 8.5 / 10.0
  • Build quality: 8.5 / 10.0
  • Fit: 8.5 / 10.0
  • High range: 9.0 / 10.0
  • Mid range: 10.0 / 10.0
  • Low range: 9.5 / 10.0
  • Less distortion: 10.0 / 10.0
  • Cost performance bonus: 11.5 / 10.0


  • Want to see the score ranking? Click here!


Basic Specifications
  • Frequency response: 7Hz to 40kHz
  • Impedance: 32 ohms
  • Sensitivity: 107dB/mW
  • Cable connector: 0.78mm 2pin


Large 13mm Dynamic Driver:-

The BQEYZ Summer is equipped with a large 13mm dynamic driver unit with PU+LCP composite diaphragm material. PU makes the diaphragm flexible while the LCP makes it thin, sturdy, and sensitive. It allows for a well-extended lower end with a snappy response.


Second-Generation Balanced Armature Driver:-

BQEYZ has redesigned the BA unit for the Summer. It features a second-generation custom-tuned balanced armature driver that has a greater sense of airiness and provides ultimate clarity for vocals and acoustic performance with a huge soundstage presentation.


5-Layers Piezoelectric Unit:-

The high-frequency response is handled by a 5-layered piezoelectric driver unit that provides ultra high-resolving ability to the pair. Thanks to this Piezoelectric driver unit, the output has no signs of sibilance or harshness and provides a highly-resolving sound output.


Ultra-Lightweight Ear Shells:-

The cavities in BQEYZ Summer are made up of skin-friendly resin material. They are super light in weight, weighing in only 4.2 grams providing a comfortable fit for long music sessions.



The BQEYZ Summer package meets the price standard.


Package contents

There is no shortage of accessories. The package contains the following:


  • BQEYZ Summer
  • 2 types of eartips 6 pairs (S / M / L)
  • Carrying case
  • Cleaning tool
  • manual


BQEYZ Summer
BQEYZ Summer
BQEYZ Summer
BQEYZ Summer
BQEYZ Summer
BQEYZ Summer


Build quality

The build quality of BQEYZ Summer fully meets the price standard.


BQEYZ Summer
BQEYZ Summer
BQEYZ Summer
BQEYZ Summer



BQEYZ Summer is comfortable to fit.


BQEYZ Summer
BQEYZ Summer
BQEYZ Summer
BQEYZ Summer


Sound quality

BQEYZ Summer has a well-balanced W-shaped sound that is fairly neutral. The low and mid frequencies that are extremely faithful to the original sound are the most attractive, and for listeners who love the natural texture, it is a model that can be the most preferable partner in this price range along with the final A3000.


Please see here for detailed reviews on sound quality.


Sound quality general comment
  • Original sound fidelity: A
  • Recommendation: A+
  • Personal preference: S-


BQEYZ Summer has a fairly near-perfect neutral sound and is very good at reproducing the texture, but there are some problems with localization and the sound field is a bit cramped.


It is very excellent as a recording monitor, and it has the advantage that it is easy to grasp the whole picture of the music because it fits the whole picture of the music in a slightly compact frame with a natural texture. However, you may be disappointed that it is a little unsatisfactory in terms of scale for everyday listening.


Also, it is a slight defect that the sound is a little hard and tends to sound a little high-pitched.


Sound quality features


  • Almost perfect neutral sound
  • Natural texture
  • Proper focus on midrange
  • Good detail
  • High fidelity to the original sound
  • Lush and highly transparent midrange
  • Crisp sound
  • High clear feeling


  • Orientation is slightly intimate
  • The sound field is slightly bent forward and narrow
  • A little high-pitched sound


General comment

BQEYZ Summer is a new star player in the $100 range. Although it is a hybrid driver model, it has very low distortion and is almost completely neutral, so you can hear the midrange with a texture that is quite close to the original sound. The sound field is a little narrow, slightly high-pitched and stimulating, but it is a good model that realizes a wonderful sound for everyone.