Celsus Companion One

Out Of Stock Celsus Companion One

Celsus Companion One Portable USB DAC & Headphone Amp for PC/IOS/Android


The Celsus Companion One, an advanced and comprehensive portable High-Res audio companion, features a high-performance headphone amp with better than 115dB signal-noise ratio. The USB DAC, utilizing ESS’s class-leading ES9018K2M DAC, decodes up to DSD128 and 384 kHz PCM audio formats. A built-in Wi Fi network allows Companion One to be used as a media streamer capable of PCM 24bit/192kHz streaming. A digital Toslink S/PDIF and one 3.5mm analog output connect Companion One to a wide array of devices.

Unique Market Position

  • The Celsus Companion One is the world’s first high-performance DAC that supports both USB cable and wireless connections to Windows, Mac, Android (*OTG) and iOS devices. Another world’s first is the Companion One’s ability to decode and stream 24bit/192kHz music files. Thus the user enjoys the highest quality desktop USB audio playback available and, with the push of a button, streams music from connected devices with better than CD-level resolution.

Low Distortion and Jitter

  • With asynchronous USB audio clocking via two internal high-accuracy low-jitter clocks for 44.1kHz (88.2/176.4/352.8) and 48kHz (96/192/384) sampling, the Celsus Companion One optimizes USB digital data transmission for ultra-low-jitter performance with better than 115dB signal-noise ratio.

Build and Sound Quality

  • The Celsus Companion One’s curved frame, machined from a single block of aluminum, is a pleasure to hold. With its top and bottom gorilla-glass covers, the Companion One’s build quality surpasses that of any portable DAC on the market today. The unit’s signal path and headphone amplifier circuit have been painstakingly optimized for maximal headphone performance.  Discerning audiophiles are bound to appreciate the Companion One’s dynamic and richly detailed music presentation. 

USB Audio:

  • Supports PCM and DSD audio formats
  • PCM audio: 16/24/32-bit audio data, 44.1/48/88.2/96/176.4/192/352.8/384 kHz native sample rate.
  • DSD audio: DSD64 and DSD128 native decode.
  • Asynchronous USB audio clocking with two internal low-jitter clocks separately for 44.1 kHz (88.2/176.4/352.8) and 48 kHz (96/192/384) sampling.
  • Switches between USB High Speed (480Mbps) and Full Speed (12Mbps)
  • Extremely low latency 
  • Supports ASIO
  • Supports Windows, Mac, Android (*OTG) and iOS devices

Wi-Fi Streaming:

  • Supports PCM format: 16/24-bit, 44.1 / 48 / 88.2 / 96 / 176.4 / 192KHz
  • Supports uPNP network media streaming and Airplay


  • Digital: Toslink S/PDIF
  • Analog: 3.5mm
  • Volume Control: 100 steps
  • Gain Control: 2 levels, for earphone impedance of 16 to 300 Ohm


  • THD+N:0.001%at 0dB, 10 kOhm load
  • Frequency Response:20Hz – 22kHz (+0, - 0.5dB)
  • Output voltage (0dB):High Gain 3Vrms; Low Gain 1.5Vrms
  • S/N ratio:> 115dB (at 2Vrms)
  • Crosstalk:< -110dB
  • Dynamic range:> 115dB
  • Output power:160mW @ 32 Ohm, 28mW @ 300 Ohm
  • Weight:0.2lb


  • Genuine leather carrying case
  • Micro USB to Apple Lightning cable
  • Micro USB to Apple 30-pin cable
  • Micro USB to PC USB cable
  • Micro USB to Android OTG USB cable
  • Protective film cover and microfiber cloth

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Due to the impact of the COVID-19 pandemic, global international shipping will delays. The delay at our Hong Kong post office is very serious, so we have changed to other fastest or most efficient international shipping. Now the normal estimated delivery time may be delayed by about 1-2 weeks. In some countries where is higher free-tax rate, we will provide free courier service as much as possible.

Free Shipping

All listed items will be shipped though Registered Airmail with tracking number if there is no extra shipping method option listed or shipping description in the product page.

Economy shipping: Will be shipped without tracking number.

Registered Airmail : Will be shipped via such as Hong Kong post , Deutsche Post , Netherlands Post , Singapore Post, you can leave us a message if you have any requirement about the shipping method .

It will be shipped via Hong Kong Post by default, Europe countries can choose to be shipped via Deutsche Post or Netherlands Post, it is also FREE, pls leave us a message if needed.

Express service: Will be shipped via DHL/EMS/UPS/FedEx

  • Views: 9323
  • Brand: Celsus
  • Product Code: Companion One
  • Availability: Out Of Stock
  • $595.00

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