xDuoo Link3 DAC Amp with Micro SD Expansion

The xDuoo Link3 is a portable USB DAC and headphone amplifier built for phones, tablets, handheld consoles, and computers that need better sound and stronger drive than a standard headphone jack or adapter can provide. It combines dual ES9039Q2M DAC chips, a 3.5mm output, a 4.4mm balanced headphone output, dual USB modes for music and gaming, a color display, detachable USB-C connectivity, and support for high-resolution PCM and DSD files in one compact body you can carry every day.

Dual outputs for more ways to listen

Link3 gives you both a 3.5mm unbalanced output and a 4.4mm balanced headphone output, so it works with everyday headphones and more demanding balanced cables without forcing you into one path. That matters when you switch between simple portable headphones at work, in-ear monitors on the go, and harder-to-drive full-size headphones at home.

Power that helps demanding headphones

For a device this size, Link3 offers useful output headroom. In normal mode it reaches up to 700mW at 32 ohms from the balanced output, and with external power connected it can reach up to 1000mW at 32 ohms. That extra power helps with control, volume margin, and low-end grip when you plug in headphones that need more than a phone can comfortably deliver.

Dual DAC architecture for cleaner conversion

Inside, Link3 uses two ES9039Q2M DAC chips along with an XMOS XU316 USB receiver. In practical terms, that means the digital signal coming from your phone, computer, or handheld gets converted with better precision before it reaches your headphones. xDuoo also lists up to 130dB SNR and THD+N as low as -112dB, which points to low background noise and solid control over distortion.

High-resolution support that covers serious music libraries

Link3 supports PCM up to 32-bit/768kHz and DSD up to DSD512, so it is ready for local hi-res files, lossless streaming, and larger digital music libraries without becoming the bottleneck. If you keep a mix of CD-quality files, high-resolution albums, and DSD releases, Link3 can handle all of them through one compact device.

Dual USB modes for music and gaming

Link3 supports UAC1.0 and UAC2.0, which makes it more flexible across devices. The UAC1.0 game mode is meant for hardware such as handheld gaming devices and consoles, while UAC2.0 handles broader high-resolution audio use with computers and mobile devices. That gives you one DAC you can move from a laptop to a handheld without changing your routine.

Expandable storage for larger portable libraries

The built-in Micro SD card slot supports cards up to 2TB, which is useful if your phone or tablet is already crowded with apps, photos, and downloads. Instead of relying only on internal device storage, you can keep more lossless and hi-res music close at hand while still using Link3 as the decoding stage.

Color display and clear playback feedback

The color TFT display puts key information where you can see it at a glance, including playback format and other device status details. Link3 also uses a multi-color LED to indicate sampling rate ranges, so you can quickly confirm whether you are playing standard PCM, high-resolution PCM, or DSD without digging through software menus.

Detachable USB-C cable for daily use

xDuoo includes a detachable USB-C cable with an 8-core single-crystal copper design. A detachable cable is easier to replace if it gets worn out, easier to pack, and easier to swap when your listening source changes. It also makes the device less frustrating to live with over time than a fixed-cable dongle.

Battery-free charging-friendly design

Link3 uses a battery-free low-power design, so there is no separate battery to manage inside the unit. It also supports independent USB-C power and charge input, which means you can keep your phone charging while you listen. That is especially useful during travel, at a desk, or during longer gaming sessions when battery drain matters.

Compact build with a more substantial feel

The housing uses a one-piece CNC aluminum alloy body with anodizing and dual-sided glass panels. The result is a portable DAC that feels more solid than a basic adapter while staying easy to slip into a pocket or bag. At about 4.2 x 1.5 x 0.6 inches (10.7 x 3.8 x 1.5 cm) and 2.5 ounces (70g), it stays small enough for daily carry.

Product highlights

• Portable USB DAC and headphone amplifier
  
• Dual ES9039Q2M DAC chips
  
• XMOS XU316 USB receiver
  
• 3.5mm unbalanced output
  
• 4.4mm balanced headphone output
  
• Up to 1000mW at 32 ohms in Super Power Mode
  
• PCM up to 32-bit/768kHz
  
• DSD up to DSD512
  
• UAC1.0 and UAC2.0 support for music and gaming devices
  
• Micro SD card slot with support up to 2TB
  
• Color TFT display
  
• Detachable USB-C cable
  
• Independent USB-C power and charge input
  
• Mac support

Specs

• Input interface: USB-C
  
• USB system: UAC1.0 / UAC2.0
  
• DAC chips: Dual ES9039Q2M
  
• USB chip: XMOS XU316
  
• Sampling rates: PCM 16-bit to 32-bit / 44.1kHz to 768kHz
  
• DSD support: DSD 1-bit / 2.82MHz to 22.57MHz
  
• Headphone outputs: 3.5mm unbalanced, 4.4mm balanced
  
• Super Power Mode output at 32 ohms: 500mW unbalanced, 1000mW balanced
  
• Normal Power Mode output at 32 ohms: 360mW unbalanced, 700mW balanced
  
• Super Power Mode output at 75 ohms: 160mW unbalanced, 300mW balanced
  
• Normal Power Mode output at 75 ohms: 100mW unbalanced, 270mW balanced
  
• Super Power Mode output at 150 ohms: 80mW unbalanced, 150mW balanced
  
• Normal Power Mode output at 150 ohms: 50mW unbalanced, 130mW balanced
  
• THD+N: -110dB at 1kHz unbalanced, -112dB at 1kHz balanced
  
• SNR: ≥120dB unbalanced, ≥130dB balanced
  
• Crosstalk: ≥75dB unbalanced, ≥123dB balanced
  
• Frequency response: 20Hz to 20kHz (±0.5dB)
  
• Expansion interface: Micro SD, up to 2TB
  
• Power consumption: 5V / 0.27A (0.3W)
  
• Dimensions: 4.2 x 1.5 x 0.6 in (10.7 x 3.8 x 1.5 cm)
  
• Weight: 2.5 oz (70g)

What’s included

• xDuoo Link3 USB DAC and headphone amplifier
  
• Detachable USB-C cable