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

Qualcomm QCC5124 

The new Qualcomm® Low Power Bluetooth SoC QCC5100 series is designed for advanced Bluetooth application. The breakthrough SoC series is engineered to reduce power  consumption by up to 65 percent for both voice calls and music streaming, compared to previous CSR8675 solution. It is designed to reduce power consumption dramatically and offers enhanced processing capabilities.

Qudelix-5K is the world 1st Bluetooth DAC/AMP designed with QCC512x chipset. QCC512x's ultra-low power consumption and the most powerful DSP capability enable Qudelix-5K to maintain high bitrate LDAC streaming more secure and for a longer time.

Bluetooth Audio Codecs

The Qudelix-5K is the world's 1st Bluetooth DAC/AMP to support all the latest codec technologies, including aptX Adaptive, LDAC, AAC, aptX HD, aptX Low Latency, aptX, and SBC.

aptX Adaptive is Qualcomm next generation dynamically adjustable audio codec designed to deliver robust, low-latency, low-bit rate, high quality wireless audio. *aptX and aptX-HD are also supported. 

For more Information : aptX Adaptive

Sony's LDAC™ is a new audio technology from Sony that allows you to enjoy high quality wireless audio via Bluetooth. With 3x the data transmitted, LDAC provides an enhanced wireless listening experience for all your music.

*LDAC and LDAC logo are trademarks of Sony Corporation. Qudelix is an official Technical Partner of SONY LDAC.

Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at the same bit rate.

Dual ES9218P

ES9218P is a high-performance 32-bit audio SABRE HiFi® D/A Converter with Quad DAC™ Technology, headphone amplifier, and analog volume control designed for the audiophile-grade application.

Qudelix-5K, integrated with two ES9218P, delivers the best in class sound quality. 

Four DAC modes

To provide more extended battery time, Qudelix-5K works with single ES9218P for the 3.5mm unbalanced output.

For the 2.5mm balanced output, dual ES9218P, one for each channel, deliver the doubled output voltage through the full differential direct signal path.

Also, users can limit the maximum output voltage to reduce extra power consumption and extend the battery time.

  • 3.5mm Unbalanced (single ES9218P)
    • 1.0V RMS mode (21H)
    • 2.0V RMS mode (16H)
  • 2.5mm Unbalanced (dual ES9218P)
    • 2.0V RMS mode (13H)
    • 4.0V RMS mode (9H)

*Quoted playback time based on using the AAC codec, 3.5mm unbalanced output.

8 x DAC Filters

Every Oversampling D/A Converter needs a digital low pass filter before D/A conversion. And the filters make the difference in sound signature, not the sound quality.

ES9218P provides eight different types of digital filters, and Qudelix-5K supports the users to select one of them for the best fit to their receivers and sources.

  • Linear phase fast roll-off 
  • Linear phase slow roll-off
  • Minimum phase fast roll-off 
  • Minimum phase slow roll-off 
  • Apodizing fast roll-off filter type 1 
  • Apodizing fast roll-off filter type 2 
  • Hybrid fast roll-off
  • Brick wall

Dual Precision Audio Clock

Qudelix 5K adapts dual MEMS oscillators, which deliver the best clock precision at lower power consumption than the conventional quartz oscillator.

USB DAC 96KHz / 24bit

Qudelix-5K supports 96KHZ/24-bit USB audio streaming. (No additional driver needed.)

You can have it charging and streaming at the same time with your PC or laptop while keeping the Bluetooth link with a smartphone and/or controlling every feature of Qudelix-5K through the companion mobile application. 

Any incoming sound alert or call ringing from smartphone will be automatically routed to Qudelix-5K, even when you listen to music through Qudelix-5K USB DAC.

Hybrid Volume Control with 0.5dB step

ES9218p has the built-in Programmable Gain Amplifier (PGA), which control the output level in the analog domain after D/A conversion. Qudelix-5K offers systemwide high precision 0.5dB step volume control capability through PGA and Digital Gain control, keeping the optimal sound quality even at the lower volume level.  Furthermore, with the companion mobile application, you can set other details on optimizing the listening environment to the best.

  • 0.5dB step Master Volume -60dB to 0dB with PGA and Digital
  • L, R Volume trim & offset control
  • Max. Volume limit option
  • Smart Volume Optimization for the best Signal to Noise Ratio

Clear Voice Call

Qudelix-5K, integrated with built-in MEMS microphone, supports Qualcomm® cVc™ noise cancellation technology. The MEMS microphone delivers 4~6dB higher performance than a conventional condenser microphone.

Qualcomm® cVc™ noise cancellation technology brings advanced audio enhancements and noise suppression to the near and far end, and provides packet loss and bit error concealment.

Laser Direct Structuring Antenna

Compared to small size chip antenna, LDS Antenna provides more space and length for better RF performance. 

Qudelix-5K adopts LDS antenna technology and offers enhanced RF performance.

Inline Microphone & Remote Control

Qudelix-5K support the inline microphone and remote control optionally. 

OTA(Over-The-Air) Firmware Update

The companion mobile app can update the Qudelix 5K F/W over Bluetooth Link.

DAC/AMP is no longer just a simple receiver or adapter, but an independent system that operates with complicated embedded software. We value our software and want to upgrade it together with the users. 


  • 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)