High-resolution decoding
The ES9038Q2M DAC supports PCM up to 32-bit/768kHz and native DSD512 playback.
HIFIWALKER
HIFI WALKER D20 USB-C DAC/Amp Dongle — Balanced Headphone Amplifier
$99.00 USD
$123.75 USD
Save $24.75 (20%)
Available
Portable USB-C decoding and headphone power
The D20 combines an ES9038Q2M DAC, dual headphone outputs, an OLED display, physical controls, and bus-powered operation in a 38g aluminum body.
3.5mm and 4.4mm outputs
Connect standard wired headphones through the 3.5mm single-ended output or compatible balanced headphones through the 4.4mm output.
Up to 380mW per channel
The balanced output is rated up to 380mW + 380mW at 32Ω, with support for 8–300Ω headphones.
OLED display and ALPS control
A 0.96-inch OLED shows playback and device status, while the ALPS rotary knob controls volume and menu settings.
Compact, bus-powered design
The CNC-machined aluminum body measures 68.35 × 31 × 16mm, weighs 38g, and draws power from the connected device.
Phone, tablet, and computer support
Designed for compatible USB-C phones and tablets with USB audio output, as well as supported Windows and macOS computers.
Specifications
- DAC chip
- ES9038Q2M
- PCM support
- Up to 32-bit / 768kHz
- DSD support
- DSD512
- THD
- <0.005%
- Signal-to-noise ratio
- >115dB / 1kHz ±2dB
- Dynamic range
- >118dB ±2dB
- Frequency response
- 20Hz–20kHz
- Channel separation
- SE >70dB / BAL >90dB
- Headphone outputs
- 3.5mm single-ended / 4.4mm balanced
- Output level
- 2Vrms SE / 4Vrms BAL
- Output power at 32Ω
- Up to 125mW + 125mW SE / 380mW + 380mW BAL
- Headphone impedance
- 8–300Ω
- Display
- 0.96-inch OLED
- Display resolution
- 160 × 80 pixels
- Control
- ALPS rotary knob
- Body material
- CNC-machined aluminum
- Dimensions and weight
- 68.35 × 31 × 16mm; 38g
- Input and power
- USB-C; draws power from connected device
- Supported systems
- Windows XP / Vista / 7 / 8.1 / 10; macOS 10+; USB-C phones and tablets supporting USB audio output
- Included in the box
- D20, dual-head USB-C cable, USB-A to USB-C cable, user manual
D20 product questions
What does the D20 do?
It connects a compatible phone, tablet, or computer to wired headphones, converting USB digital audio into an analog headphone signal.
Can the D20 add Hi-Res playback to a phone?
Yes, when the USB-C phone or tablet supports USB audio output. Playback capability also depends on the music app, source quality, files, and device settings.
Which music apps can be used?
On supported devices, the page lists Apple Music, Tidal, Qobuz, Spotify, YouTube Music, and local music players. Actual quality depends on the service, subscription tier, app settings, and source.
Which devices and systems support the D20?
It is designed for USB-C devices supporting USB audio output, including many Android phones, USB-C iPhones, tablets, Windows computers, and Mac computers. The specification lists Windows XP, Vista, 7, 8.1, and 10, plus macOS 10 and above.
Which headphones can I use?
The D20 supports wired headphones from 8–300Ω through its 3.5mm single-ended or 4.4mm balanced output.
What is the difference between the headphone outputs?
The 3.5mm output is for standard wired headphones. The 4.4mm balanced output supports compatible balanced cables and provides the higher output level, up to 4Vrms.
How much output power does the D20 provide?
At 32Ω it is rated up to 125mW + 125mW through 3.5mm and up to 380mW + 380mW through 4.4mm.
Which Hi-Res formats does the D20 support?
It supports PCM up to 32-bit/768kHz and DSD512, depending on the source device, music app, and audio files.
What do the display and knob control?
The 0.96-inch OLED shows playback or device status. The ALPS rotary knob controls volume and menu operation, including Gain, L/R, FLTR, DISP, HIDKEY, and Light settings listed on the page.
Does the D20 need to be charged?
No. It has no separate battery and draws power from the connected phone, tablet, or computer.
Is the D20 a standalone music player?
No. It is a USB-C DAC and headphone amplifier used with a compatible source device.
Does the D20 require an app, driver, or separate power supply?
The product page describes plug-and-play operation with no app, driver, or separate charging required.