UNO USB Audio DAC Amplifier User Guide

UNO USB Audio DAC Amplifier

Thank you for purchasing the UNO. The UNO is a USB audio DAC amplifier.

Operation Instruction

1. EQ mode selection
   This button selects the following EQ modes. The color of the EQ mode LED on top (item 6) indicates the selection.

2. PowerMatch
   PowerMatch setting should be off for IEMs and on for on/over-ear headphones.
   Warning:
   Due to the high power of UNO, before changing the PowerMatch setting, always start off at a low volume level so that there is no risk of damage to your headphones, speakers, or your hearing. iFi audio is not responsible for any hearing or equipment damage from misuse.

3. Power ON/OFF and Volume control
   This is the power switch and volume control knob.

4. Audio Format LED (kHz)
   The LED color scheme indicates the audio format and sampling frequency received by UNO from the music source.
   LED/Mode

   • Green PCM 44.1/48/88.2/96kHz
   • Yellow PCM 176.4/192/352.8/384kHz
   • Cyan DSD 64/128
   • Blue DSD 256
   • Magenta MQA

5. S-Balanced 3.5mm headphone output
   Connect 3.5mm stereo headphones. Compatible with both TRS and TRRS configurations.

6. EQ mode LED
   The LED color scheme indicates the UNO’s EQ mode, please see item 1.

7. RCA analogue Line output
   Connect analog RCA interconnects to an amplifier.

8. USB-C audio and power input
   This is a USB-C input. It connects UNO to the computer or phone audio source and can also be powered by it.

Plays up to 32-bit 384kHz PCM, DSD256 and is an MQA renderer.

Note:
For use with PC it is necessary to download drivers.

Tip:
For the required driver and all the latest firmware updates please visit our

website: https://ifi-audio.com/download-hub/.

Specification

• Digital Input: USB-C
• Formats:
  • DXD 384kHz
  • PCM 384kHz
  • MQA
• DAC: Bit-Perfect DSD & DXD DAC by ESS

Line Section

• Output: 2V max.
• Output Impedance: <100
• SNR: >124dB
• DNR: >124dB @ 0dBFS
• THD+N: <0.0003% (2V/100k)

Headphone Section

• Output: >2.6V/3.5V max. at 32/300
• Output Power: >211mW @ 32; 39mW @ 300
• Output Impedance: <1
• SNR: >115dB
• DNR: >115dB @ 0dBFS
• THD+N: <0.02% (1.27V @ 16)
• Channel separation: <98dB (1kHz/600)
• Frequency Response: 10-80kHz(-0.5dB)
• Power supply requirement: USB-C 5V/0.5A
• Power consumption:
  • No Signal ~0.8W
  • Max Signal ~1.5W
• Dimensions: 88 x 81 x 26 mm (3.5″ x 2.8″ x 1.0″)
• Net Weight: 92 g (0.2 lbs)
• Limited Warranty: 12 months*

1. 12 months typical or as permitted/required by local reseller laws.
2. Specifications are subject to change without notice.

ifi-audio.com.

References

• iFi audio | the Award-Winning Audio Technology Company
• Download Hub | Software and firmware for your iFi audio devices

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