Astell & Kern USB-C Dual-DAC Cable PEE51




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PEE51 by Astell&Kern is a USB-C Dual-DAC Cable, intended to be an inline external DAC for most devices. It has been designed as an extension of existing Astell&Kern Digital Audio Player (DAP) products.

The A&K development team set out to create a product that would provide answers to the following questions:

  1. Smartphone manufacturers are removing headphone jacks from their products. Without a headphone jack, how can I listen to music on a smartphone with the headphones and earphones I currently own?
  2. As streaming services begin to support high-quality, high-resolution audio, are wireless earphones and headphones able to provide the full audio playback experience?
  3. How can I enjoy high-quality music playback or games, with dynamic and realistic sound, on my computer without buying an expensive high-end sound card?

Their answer was the PEE51 - a dedicated Dual-DAC with hi-fi quality, ultra-high resolution sound, featuring two Cirrus Logic CS43198 MasterHIFI™ DACs which supports native DSD256 and 32bit/384kHz playback. With the USB-C Dual-DAC Cable, you can experience premium, high-resolution audio direct from your computer or mobile device.

The dual CS43198 DACs are paired with an independent analog amplifier, designed to provide true audio playback. You can feel the live, warm, clear sound as intended, without distortion. This is possible based on years of Astell&Kern expertise in AMP design. Although PEE51 is a small simple cable-type external DAC, it is able to drive high-impedance headphones with a 2 Vrms output level.

The dual-DAC cable features a USB-C connection, which can be found on the latest Android-based smartphones, and on Windows and Mac computers. This allows you to Plug & Play on most devices. Please note: iOS devices are NOT supported - Mac OS desktop / laptop only.

In addition, the dual-DAC cable draws power from the connected device via USB-C. There is no need for a separate charger. PEE51 supports any headphone or earphone with a 3.5 mm jack connector. Please note that earphones and headphones that support 3-pole and 4-pole 3.5 mm plugs can be used, however the in-line controller and microphone functions built into 4-pole earphones and headphones are not supported.

A custom-made, 4-core cable is used to deliver sound through the cable. To enhance durability against disconnection, the cable is reinforced to withstand up to 200 N of tensile force, using aramid fibre. This is achieved by wrapping silver-plated copper plus copper wire in a spiral around a central core made from Technora Aramid, which blocks external noise. A separate shielding treatment is applied to the cable, blocking interference from unwanted digital / analog signals from the playback device.


  • Inline USB-Powered DAC - No Additional Charging Needed
  • Full Metal Housing Design
  • Dual-DAC Hi-Fi Audio Chipset
  • Silver-Plated Copper Shielded Cable
  • Small Size, but Powerful Output


  • Model: PEE51
  • Body Material: Zinc Alloy
  • Body Color: Titan
  • Frequency Response: ± 0.030 (Condition: 20 Hz ~ 20 kHz)
  • Signal to Noise Ratio: 118 dB @ 1 kHz, Unbalanced
  • THD+N: 0.0004% @ 1 kHz, Unbalanced
  • IMD SMPTE: 0.0003% 800 Hz 10 kHz (4:1) Unbalanced
  • Output Impedance: 2 Ohm
  • Output Power / Voltage: 2 Vrms (Condition No Load)
  • DAC: Cirrus Logic CS43198 x 2
  • Sample Rate: PCM - Support up to 32bit/384kHz / DSD Native - DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), Stereo / DSD256(1bit 11.2MHz), Stereo
  • Input: USB Type-C Input (for Windows 10, Android Smartphone, Android Tablet PC, macOS. NOT iOS)
  • Output: 3.5 mm Headphone
  • Dimensions: USB Plug - 17 x 50 x 10.3 mm / 3.5 mm Headphone - 12 x 20 x 8.2 mm
  • Weight: About 25 g

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DAC Specification

Harmonic Distortion:
0.0004% @ 1 kHz
118 dB
Frequency Response:
20 Hz - 20 kHz
Cirrus Logic CS43198 x 2


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