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.

(True Wireless Earbuds Review) Tronsmart Onyx Ace Pro: Bright and detailed sound. Relatively high original sound fidelity and crisp, clear sound. Excellent communication quality.

Tronsmart Onyx Ace Pro

Tronsmart Onyx Ace Pro




  • 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 like clear sound
  • People who like bright sound
  • People who do not like noisy low frequency
  • People who value communication quality
  • People who value cost performance


Overview of Tronsmart Onyx Ace Pro

This review will give an overview of Tronsmart Onyx Ace Pro. A complete review of this product can be found here.


audio-sound Score

  • Total Score: 8.6/ 10.0
  • Package: 8.0 / 10.0
  • Build quality: 8.0 / 10.0
  • Fit: 8.5 / 10.0
  • High range: 8.5 / 10.0
  • Mid range: 10.0 / 10.0
  • Low range: 7.0 / 10.0
  • Less distortion: 7.5 / 10.0
  • Communication quality: 9.0 / 10.0
  • Cost Performance Bonus: 11.0 / 10.0


  • Want to see the score ranking? Click here!


Basic Specifications
  • Continuous / maximum playback time: 6.5h / 27h
  • Waterproof performance: IPX5
  • Supported codecs: aptX Adaptive / AAC / SBC


  • Bluetooth 5.2 and automatic pairing

    Tronsmart bluetooth earphones are equipped with the latest Bluetooth 5.2 and use the latest chip QCC3040, which has improved data transfer speed and connection stability, reduced sound skipping and interruption, and greatly improved sound quality issues and delays. The wireless earbuds require an initial registration with the equipment, and from the second time on, they are connected as soon as the lid is opened, which is very convenient.

  • Hi-Fi high sound quality and comfortable fit

    The earphones wireless bluetooth are equipped with 13mm drivers for very clear stereo Hi-Fi sound and natural listening comfort. In addition, ACC/SBC/aptX/aptX Adaptive codecs are also supported. The ergonomically designed Bluetooth earbuds fit snugly in the ear and do not easily fall out of the ear, making them stress-free even when worn for long periods of time. You can enjoy your music to the fullest.

  • Hands-free calling and easy operation by touch

    High-quality sound The wireless earbuds feature CVC8.0 noise cancellation for calls and a built-in high-sensitivity microphone that cancels out ambient noise for clear hands-free calls. The touch sensor makes it easy to perform basic operations such as volume control, play/stop, return/forward songs, answer/end/reject calls, and Siri/voice commands with a light tap of the finger. The simple touch-sensitive operation makes it easy to use even for beginners.
    The battery capacity of the main body of the bluetooth earphones with microphone is 6.5 hours of playback, and when used with the charging case, up to 27 hours of continuous use is possible. In addition, the charging case can be fully charged in just 2 hours with Type C fast charging.

  • One-button reset and IPX5 waterproof rating

    Open the charging case lid and press the reset button on the bottom for 10 seconds to easily reset the waterproof bluetooth earbuds. IPX5 everyday life waterproof rating: sweat resistant, protection against splash and light rain.

Tronsmart Onyx Ace Pro
Tronsmart Onyx Ace Pro
Tronsmart Onyx Ace Pro
Tronsmart Onyx Ace Pro



Package is above standard in price.


Package contents

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

  • Tronsmart Onyx Ace Pro
  • Charging case
  • USB Type-C cable
  • Manual


Tronsmart Onyx Ace Pro

Tronsmart Onyx Ace Pro
Tronsmart Onyx Ace Pro

Tronsmart Onyx Ace Pro


Build quality

Build quality meets price standard.


Tronsmart Onyx Ace Pro

Tronsmart Onyx Ace Pro
Tronsmart Onyx Ace Pro



The fit is good.


Tronsmart Onyx Ace Pro

Tronsmart Onyx Ace Pro
Tronsmart Onyx Ace Pro
Tronsmart Onyx Ace Pro


Connection quality

I tested it by connecting it to a Cayin N6II/E02 with aptX.


I don't know because I haven't been in crowds, but it is stable in the home. Distance tolerance is excellent, and the connection is seamless and intact even at a distance of about 5 meters. The connection became unstable and tended to be disconnected for a while when interrupted by obstructions, but after a minute or so the connection stabilized and I was able to listen to music consistently after that.


There may be a small amount of background noise, but most people probably won't notice it.



The operating interface is a touch type.


Power ON Open the charging case lid
Power OFF Place the earphones in the charging case and close the lid.
Pairing After turning on the power, if there is no connection, it will automatically enter pairing mode
Song playback Tap the multifunction button twice
Stop playback Tap the multifunction button twice
Forward song Press and hold the multifunction button on the right ear for 2 seconds
Backward Press and hold the multifunction button on the left ear for 2 seconds
Volume + Tap the multifunction button on the right ear once
Volume - Tap the multifunction button on the left ear once
Answer call Tap the multifunction button twice
End call Tap the multifunction button twice
Reject call Press and hold the multifunction button for 2 seconds
Gaming mode ON/OFF Tap the multifunction button on the left ear 3 times
Activate voice assistant Tap the multifunction button on the right ear three times


Sound quality

Sound quality description

The Onyx Ace Pro has a sound signature that is typical of an inner-ear type, with an emphasis on mid to high frequencies. The midrange is bright, detailed, and front-facing.


The following review was tested on a FiiO M15 with an aptX connection.


Please see here for detailed reviews on sound quality.


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


It has a better sound balance than its rivals among inner-ear models, and is particularly accurate in its mid-range texture expression.


Sound quality features

  • Accurate texture
  • Fairly good localization
  • High clarity
  • Fairly faithful to the original
  • Bright sound
  • Delicate


  • Thin low frequency range
  • Aggressive sound
  • May not be suitable for those sensitive to high frequencies
  • Mediocre clarity
  • Mediocre resolution


General comment

The Tronsmart Onyx Ace Pro is an in-ear fully wireless earphone with excellent communication and build quality that sounds clear and crisp with good original sound fidelity. The shallow and thin low frequencies characteristic of the inner-ear type are a drawback, but in general it is not a bad choice.


Tronsmart Onyx Ace Pro

Tronsmart Onyx Ace Pro