1. Introduction
The iFi uno is a compact Digital-to-Analog Converter (DAC) and headphone amplifier designed to enhance the audio quality from various digital sources. It connects via USB-C and offers dedicated outputs for headphones and active speakers, along with selectable audio modes for different entertainment types.
Front view of the iFi uno DAC and Headphone Amplifier, showing the volume knob, EQ button, Power Match button, and headphone output.
The iFi uno DAC and Headphone Amplifier held in a hand, demonstrating its compact and portable design.
2. Package Contents
Verify that all items are present in the package:
- 1x iFi uno unit
- 1x USB-A to USB-C Cable
- 1x Quick Start Card
- 1x Instruction Card
Image showing the iFi uno, USB-A to USB-C cable, and quick start guide included in the package.
3. Product Features
- Integrated DAC and Headphone Amplifier for improved audio.
- USB-C input for connection to Windows PCs, Apple Macs, tablets, and smartphones.
- Three selectable EQ modes: Music, Movie, and Game, to optimize sound for different content.
- 3.5mm headphone output and stereo RCA outputs for connecting to an amplifier or powered speakers.
- Power Match feature to adjust gain for various headphone sensitivities.
- Supports high-resolution audio up to 32-bit/384kHz PCM, DSD256, and MQA.
- Utilizes an ESS Sabre DAC chipset with jitter elimination technologies for clear sound.
- Features iFi's S-Balanced circuit for enhanced performance with both single-ended and balanced headphones.
4. Setup Guide
4.1 Connecting the iFi uno
- Power and Data Input: Connect the supplied USB-A to USB-C cable to the USB-C input port on the rear of the iFi uno. Connect the USB-A end to a USB port on your computer (Windows PC, Apple Mac), smart device, or a compatible USB power adapter. The iFi uno receives both power and audio data through this single USB-C connection.
- Headphone Output: For headphone listening, plug your headphones into the 3.5mm S-Balanced headphone output located on the front of the unit.
- RCA Analog Output: To connect to an external amplifier or powered speakers, use RCA cables (not included) to connect the RCA analog outputs on the rear of the iFi uno to the corresponding inputs on your audio system.
The iFi uno connected to a laptop, demonstrating a typical setup for desktop audio enhancement.
Rear panel of the iFi uno, illustrating the RCA analog outputs and the USB-C input port.
Connection diagram for the iFi uno, detailing USB-C input, 3.5mm headphone output, and RCA analog output.
4.2 Driver Installation (Windows Only)
For Windows users, it may be necessary to install specific drivers for optimal performance. Visit the official iFi audio website and navigate to the support section for the uno model to download the latest drivers. macOS and Linux systems typically do not require additional drivers.
5. Operating Instructions
5.1 Volume Control
The large knob on the front panel controls the output volume for both the headphone and RCA outputs. Rotate clockwise to increase volume and counter-clockwise to decrease. Adjust to a comfortable listening level.
5.2 EQ Modes
Press the EQ button on the front panel to cycle through three distinct audio modes:
- Music Mode: Optimized for general music listening, providing a balanced sound profile.
- Movie Mode: Enhances dialogue clarity and soundstage for cinematic experiences.
- Game Mode: Designed to emphasize spatial audio cues for gaming.
The LED indicator above the EQ button will change color to indicate the active mode. Note that EQ modes primarily affect the headphone output.
5.3 Power Match
The Power Match button adjusts the gain of the headphone amplifier. Press this button to toggle between low and high gain settings. Use the low gain setting for sensitive headphones or in-ear monitors (IEMs) to prevent excessive volume and noise. Use the high gain setting for less sensitive or high-impedance headphones that require more power.
5.4 LED Indicators
The iFi logo LED on the top panel indicates the audio format being played:
- 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
6. Maintenance
To ensure the longevity and optimal performance of your iFi uno, follow these guidelines:
- Keep the device clean by wiping it with a soft, dry cloth. Avoid using liquid cleaners or solvents.
- Do not expose the device to extreme temperatures, humidity, or direct sunlight.
- Avoid dropping or subjecting the device to strong impacts.
- Ensure proper ventilation and do not block any openings.
7. Troubleshooting
- No Sound:
- Verify that the USB-C cable is securely connected to both the iFi uno and the source device.
- Check the volume level on both the iFi uno and your source device.
- Ensure the correct audio output device is selected in your computer's sound settings.
- If using RCA outputs, confirm the correct input is selected on your amplifier or powered speakers.
- Distorted Sound or Noise:
- Reduce the volume level.
- If using sensitive headphones, ensure Power Match is set to low gain.
- Try a different USB port or cable.
- If experiencing noise with EQ modes (especially Game mode), try disabling the EQ or switching to Music mode. Some users report increased noise in Game mode with sensitive headphones.
- Intermittent Audio:
- Check all cable connections for looseness.
- Ensure the USB power source is stable.
- Update drivers if on Windows.
- Device Not Recognized by Computer:
- Try connecting to a different USB port.
- Restart your computer.
- Install or update the necessary drivers (Windows).
8. Specifications
| Feature | Specification |
|---|---|
| Digital Input | USB-C |
| Formats Supported | DSD 256/11.3MHz, DXD 384kHz, PCM 384kHz, MQA |
| DAC | Bit-Perfect DSD & DXD DAC by ESS |
| Headphone Output | 3.5mm S-Balanced |
| Line Output | RCA Analog, 2V max. |
| Output Power (Headphone) | ≥2.6V / 3.5V max. at 32 Ω / 300Ω; ≥211mW @ 32Ω; 39mW @ 300Ω |
| SNR (Headphone) | ≥115dB |
| SNR (Line) | ≥124dB @ 0dBFS |
| Dynamic Range (Headphone) | ≥115dB |
| THD+N (Headphone) | ≤0.02% (1.27V @ 16Ω) |
| THD+N (Line) | ≤0.0003% (2V/100k) |
| Channel Separation | ≥98dB (1kHz/600Ω) |
| 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 (L x W x H) | 88 x 81 x 26 mm (3.46 x 3.19 x 1.02 inches) |
| Net Weight | 92 g (0.2 lbs) / 5.3 ounces |
| Material | Plastic |
| Model Number | 0316001 |
| Example Serial Number | 6101000005 |
| UPC | 5060738787234 |
Specifications are subject to change without notice.
Official specifications sheet for the iFi uno, detailing technical parameters and package contents.
9. Warranty and Support
The iFi uno comes with a standard 12-month limited warranty from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use. Please retain your proof of purchase for warranty claims.
For technical support, warranty service, or further inquiries, please visit the official iFi audio website or contact their customer service department. Additional protection plans may be available from your retailer.
Online Resources:
- Official iFi Audio Website: ifi-audio.com
- Product Support Page: Refer to the iFi audio website for the specific support page for the uno model.
