About Us

Qudelix is an audio system engineering company.

We deliver portable and affordable high-end audio solution for everyone. Based on the highly extensive background and experience of our R & D team, we design and implement the cost-effective high-end audio system. In a digital audio system, System-on-Chip (SoC) is one of the most important keys to the best product. We always keep up with the latest semiconductor technology and build the best application with optimized software and hardware.

Sony’s LDAC™ Official Technical Partner

As an Official Technical Partner of Sony's LDAC, we developed the LDAC solution for Qualcomm QCC512x platform, which is the best-in-class SoC for high-end Bluetooth application.

LDAC is a Bluetooth Audio Codec, which provides the best sound quality over the other codecs. Every Android device with Oreo or higher supports LDAC by default. Currently, over 38% of the total Android devices support LDAC, and the numbers are getting increased 

On the other hand, LDAC sink or receiver application does need Bluetooth SoC. QCC512x, the latest technology of Qualcomm, is the most advanced Bluetooth SoC, which is the best fit to LDAC receiver. QCC512x's ultra-low power consumption and the most powerful DSP capability enable the application devices to maintain high bitrate LDAC streaming more secure and for longer time.

We developed the LDAC solution for QCC512x SoC and support worldwide set makers integrate LDAC on their QCC512x applications. 

Please contact support@qudelix.com for further information.

*LDAC and LDAC logo are trademarks of Sony Corporation.


Qudelix-5K Reference DAC/AMP

  • Qualcomm QCC5124 Bluetooth System-on-Chip
  • Dual ES9218P SABRE HiFi® DAC
    • 3.5mm Unbalanced output max. 2.0V RMS 
    • 2.5mm Balanced output max. 4.0V RMS
  • aptX Adaptive, LDAC, AAC, aptX-HD, aptX, SBC
  • 500mA Battery
    • Max. 20 hours streaming (AAC Standard 1V RMS mode)
  • High-Resolution USB DAC 96KHz / 24-bit
  • 10-band Double Precision PEQ/GEQ
  • High Sensitivity 3-dimensional LDS Antenna
  • Qualcomm® cVc™ noise cancellation technology
    • High Sensitivity MEMS Microphone
    • Earphone Inline Remote/Mic. Support
  • Companion mobile app iOS/Android


  • Plastic Body (Black) with anti-scratch UV Coating
  • Aluminium Clip (Dark Gray)


52.8(H) x 26.7(W) x 15.6(D) mm (including Clip) 



Learn More


The new Qualcomm® Low Power Bluetooth SoC QCC5100 series designed for advanced Bluetooth application.

Read More


Audiophile grade Dual ES9218P SABRE HiFi SoC delivering output power up to 2.0Vrms Single-Ended and 4.0Vrms Balanced.

Read More

Bluetooth Audio Codecs

The world's first Bluetooth DAC AMP supporting all the latest codec technologies, including aptX Adaptive, LDAC, AAC, aptX HD, aptX, and SBC.

Read More


96KHz 24-bit USB DAC fully supporting 64-bit double precision equalizer

Read More


10 Band 64-bit Double Precision Equalizer with overdrive detection

Read More


Certified SONY LDAC Solution

Read More

Battery Time

500mA Battery up to 20 hours of streaming

Read More


PCB Durability and Reliability

Read More

RF Antenna

3-Dimensional LDS (Laser Direct Structuring) ANTENNA

Read More

Size & Weight

Small and Lightweight

Read More


Package and the included

Read More


One year warranty (Basic Plan) from the date of the first app connection.

Read More


Welcome to Qudelix-5K forum.


  • 2019. 10. 25 02:37 PM

AKM and ESS offer outstanding performance and Sound Quality. The Sound Signatures slightly differ from each other, but it's a matter of preference.

Read More
  • 2019. 10. 25 02:37 PM

Sensitivity represents how efficiently the earphone/headphone unit can translate the electrical energy into the acoustic sound.

Read More