iFi UNO USB-Audio DAC Amplifier

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

1. EQ mode selection

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

Game	Movie	Music	Off

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 colour 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 renderer

5. S-Balanced 3.5mm headphone output

Connect 3.5 mm stereo headphones. Compatible with both TRS and TRRS configurations.

6. EQ mode LED

The LED colour scheme indicates the UNO's EQ mode, please see item 1.

7. RCA analogue Line output

Connect analogue 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 384 kHz 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/

Specifications

Specification
Digital Input:	USB-C
Formats:	DSD 256 / 11.3MHz DXD 384kHz PCM 384kHz MQA Renderer
DAC:	Bit-Perfect DSD & DXD DAC by ESS
Line Section
Output:	2 V max.
Output Impedance:	<100 Ω
SNR:	≥ 119 dBA
DNR:	≥ 115 dB @ 0 dBFS
THD+N:	≤ 0.03% @ 0 dBFS
Headphone Section
Output:	≥ 2.6 V / 3.5 V max. at 32 Ω / 300 Ω
Output Power:	≥ 211 mW @ 32 Ω; 39 mW @ 300 Ω
Output Impedance:	<1 Ω
SNR:	≥ 113 dBA
DNR:	≥ 110 dB @ 0 dBFS
THD+N:	≤ 0.02% (1.27 V @ 16 Ω)
Channel separation:	≥ 80 dB (1 kHz / 600 Ω)
Frequency Response:	10-80 kHz (-0.5 dB)
Power supply requirement:	USB-C 5V/0.5A
Power consumption:	No Signal ~0.8 W Max Signal ~1.5 W
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*

*12 months typical or as permitted/required by local reseller laws.

**Specifications are subject to change without notice.

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