Basic DAC/Amp
- ESS DAC — Bit-Perfect DSD & DXD DAC by ESS
- Hi-Res formats — PCM 384kHz / DSD256 / MQA
- Headphone output — 3.5mm S-Balanced
- Output power — ≥70mW at 32Ω / ≥14mW at 300Ω
- Compact USB-C dongle — <0.4Ω output impedance
HIFI WALKER D20 USB-C DAC/Amp Dongle — Balanced Headphone Amplifier
The D20 is a portable HiFi DAC/Amp dongle engineered for seamless audio upgrades, delivering instant, high-fidelity sound across mobile and desktop devices without complex setup.
Hi-Res Streaming from Your Phone
D20 is a portable USB DAC and headphone amplifier for phones, tablets, and computers. Connect your wired headphones and enjoy compatible lossless and Hi-Res music from your favorite streaming apps or local files, without carrying a separate music player.
Cleaner, More Detailed Sound
The ESS9038Q2M DAC, dedicated headphone amplifier, and low-noise audio design work together to deliver a cleaner background, clearer vocals, finer instrument detail, and better separation than a basic headphone adapter. Supports PCM up to 32-bit/768kHz and native DSD512.
More Power for Wired Headphones
Give your wired headphones the power they need to sound fuller, more dynamic, and more controlled. The 4.4mm balanced output delivers up to 380mW + 380mW at 32Ω, with support for headphones from 8–300Ω.
3.5mm + 4.4mm Headphone Outputs
Use the 3.5mm output with everyday wired headphones and IEMs, or switch to the 4.4mm balanced output for compatible headphones that need more power and better channel separation. One compact DAC/amp works with both connections.
Pocket-Sized, No Charging Needed
At just 38g, D20 is easy to carry in a pocket or bag and draws power directly from your connected device, so there is no extra battery to charge. The OLED display and physical ALPS control knob make volume and settings easy to manage without constantly touching your phone.
Guaranteed Safe Checkout
Fast Shipping
Customs & duties included
Warranty
1-Year Warranty
Money-back Guarantee
30-day Satisfaction Guaranteed
Customer Support
Live Chat & Email
$99.00 USD$123.75
-$24.75
HIFI WALKER D20 USB-C DAC/Amp Dongle — Balanced Headphone Amplifier
Sale price$99.00 USD
Regular price$123.75 USD
HIFI WALKER D20 Portable USB-C DAC & Amp
Plug-and-play design engineered to instantly upgrade your smartphone sound.
No AppNo DriverNo Separate Charging
How Does D20 Work?
From raw digital noise to pristine HiFi sound in 3 steps.
Step 1. Direct Signal Bypass
Retrieves pure digital data straight from your phone/PC via Type-C, completely bypassing noisy internal phone audio chips.
Step 2. Studio-Grade Audio Processing
The flagship ESS9038Q2M DAC & dedicated FPGA clock convert raw data into ultra-low distortion analog sound.
Step3. High-Power Driving
Delivering up to 380mW clean power through 3.5mm and 4.4mm balanced ports, driving demanding headphones with wide dynamics.
Three Core Technologies Behind Better Sound
D20 combines high-resolution decoding, stronger headphone power, and clean signal control to deliver clearer, more capable wired listening from your phone or computer.
Hear Cleaner Detail
Mobile Flagship Decoding: Equipped with the mobile flagship ES9038Q2M DAC to easily process 32bit/768kHz and DSD512 lossless audio files.
High Dynamic Range (＞118dB): Makes the shifts in your music more lifelike, accurately capturing everything from quiet breaths to heavy bass.
Ultra-Low Distortion (THD+N < 0.005%): Minimizes audio distortion and interference for a pure listening experience, accurately preserving true instrument tones.
More Power for More Headphones
Dual Audio Outputs (3.5mm & 4.4mm): Features both 3.5mm single-ended and 4.4mm balanced ports to seamlessly connect with all your headphones.
Powerful Output (Up to 380mW / 4Vrms): Delivers robust power to effortlessly drive high-impedance headphones and unleash their full sound potential.
Wide Impedance Range (8–300Ω): Broad compatibility supporting headphones and earphones ranging from 8Ω to 300Ω.
Pure & Immersive Soundstage
FPGA Clock Precision: Effectively minimizes timing errors (jitter) during audio transmission for a stable and precise signal.
High Signal-to-Noise Ratio (>115dB SNR): Significantly suppresses background noise to provide an exceptionally clean listening environment.
Solid Control & Dynamics (>118dB DNR / <0.005% THD): Ensures that complex, high-volume passages remain well-controlled, natural, and free from harshness.
Unlock Full Hi-Res Streaming on iPhone & Android
Smartphones alone cannot process high-resolution tracks above 48kHz, leaving rich studio details unheard.
Connecting the D20 external DAC bypasses your phone’s internal limits, allowing you to stream full 24-bit/192kHz Lossless Hi-Res audio effortlessly.
Power Your Headphones with Up to 7.8× Driving Power
Weak phone output chokes high-impedance headphones, leading to flat and quiet sound.
Plug in the D20 to supply up to 7.8× more power (380mW)—delivering rich bass, wide soundstage, and effortless dynamics for any wired headphones.
One Upgrade for All Your Screens
Supported Systems:
Mobile: iOS, Android
Desktop: Windows XP / Vista / 7 / 8.1 / 10, macOS 10 & above
Phone
Laptop
TabletDesigned to Feel Like Real Hi-Fi
From its CNC aluminum body to its OLED display and tactile knob control, D20 USB DAC/Amplifier is built to make portable wired listening feel simple, solid, and precise.
Premium aluminum Body
· CNC-Machined Aluminum· 10+ Shape Revisions· Smooth Rounded Edges· Built for Everyday Use
OLED Display at a Glance
· The only OLED display in its price class.· See the current sample rate, gain, and other key settings without opening an app.
One Knob. Full Control.
· Turn the knob for quick, precise volume control.· Press and hold to enter parameter mode, adjust Gain,L/R,FLTR, DISP, HIDKEY and Light directly on D20.
Ultra-light, Ultra-Small
· At just 38g, D20 weighs less than a typical egg.· Its 68.35 × 31 × 16mm body is about the size of a pocket lighter· Small & Light enough to stay connected without feeling like extra gear.
Small, Light, and Always Ready to Listen
Connect to a compatible phone, laptop, or tablet, then listen with the wired headphones you already own. D20 draws power from the connected device, so there is no separate battery to charge.
Commute
Office
Relaxing
Travel
Why Choose D20?
HIFI WALKER D20
- ESS9038Q2M DAC + headphone amp
- Stronger audio performance — <0.005% THD, ≥115dB SNR, >118dB dynamic range
- Dual headphone outputs — 3.5mm single-ended + 4.4mm balanced
- More driving power — Up to 380mW × 2 at 32Ω via 4.4mm
- Faster, easier control — ALPS knob + 0.96-inch OLED for volume, gain and settings
Specifications
DAC Chip
ES9038Q2M
PCM Support
Up to 32bit / 768kHz
DSD Support
DSD512
THD
<0.005%
SNR
>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
Up to 125mW+125mW/32Ω SE / 380mW+380mW/32Ω BAL
Headphone Impedance
8-300Ω
Display
0.96-inch OLED
Resolution
160 × 80 pixels
Control
ALPS rotary knob
Playback Status Display
Supported
Body Material
CNC-machined aluminum
Dimensions
68.35 × 31 × 16mm
Weight
38g
Input
USB-C
Supported Systems
Windows XP / Vista / 7 / 8.1 / 10, macOS 10+
Phone / Tablet Support
USB-C devices that support USB audio output
Included in the Box
D20 USB DAC/Amplifier, USB-C to USB-C cable, USB-A to USB-C adapter/cable, user manual
Power
Draws power from connected device, no separate charging required
See the D20 USB DAC/Amplifier in Action
Flagship DAC. Pocket-Sized. - experience the difference.
D20 USB DAC/Amplifier Unboxing & First Look
ESS9038Q2M DAC, dual outputs (3.5mm + 4.4mm), DSD512 decoding - see what's inside the box.
Meet the D20 USB DAC/Amplifier
Flagship DAC chip, ALPS encoder knob, CNC aluminum build - one dongle for every headphone.
38g, Zero Compromise
The new benchmark for portable USB DAC amps - hear what up to 380mW balanced output can do.
In the Box
D20 USB DAC/Amplifier
×1
Dual-Head Type-C Cable
×1
USB-A to USB-C Cable
×1
User Manual
×1
Frequently Asked Questions
What is a USB-C DAC dongle?
A USB-C DAC dongle is a compact external DAC/Amp that connects your phone, tablet, or computer to wired headphones. D20 converts digital audio into an analog headphone signal and gives your device a more capable wired Hi-Fi output.
Why do I need a DAC dongle if my phone already plays music?
Your phone can play music, but its built-in audio or a basic adapter may not deliver the decoding quality, output power, or headphone control your wired headphones can use. D20 adds a dedicated ES9038Q2M DAC, stronger headphone output, and 3.5mm / 4.4mm connections.
Can D20 turn my phone into a Hi-Res music player?
Yes. With a USB-C phone or tablet that supports USB audio output, D20 lets you stream or play local music through wired headphones with dedicated DAC/Amp hardware. Hi-Res playback depends on your music app, source quality, and device settings.
Can I use D20 with Spotify, Apple Music, Tidal, Qobuz, or YouTube Music?
Yes. D20 works as a USB-C audio output for supported devices, so you can listen through apps such as Apple Music, Tidal, Qobuz, Spotify, YouTube Music, and local music players. Actual audio quality depends on the streaming service, subscription tier, app settings, and source file.
Is D20 useful if I already own a HIFI WALKER H2 or another Hi-Fi player?
Yes. A dedicated Hi-Fi player is great for local music files, while D20 is useful when you want to hear new online songs from your phone through wired headphones. It gives your phone a portable USB-C DAC/Amp output for streaming and daily listening.
Is D20 a more affordable alternative to an Android Hi-Fi player?
D20 is not a standalone Android music player, but it can give the phone you already own a dedicated DAC/Amp output for wired headphones. That makes it a more accessible way to build a portable Hi-Fi streaming setup without buying or carrying another player.
Does D20 work with USB-C iPhone, Android, Mac, and Windows?
D20 is designed for USB-C devices that support USB audio output, including many Android phones, USB-C iPhone models, tablets, Windows computers, and Mac computers. The specification sheet lists Windows XP / Vista / 7 / 8.1 / 10 and macOS 10+ support.
Is D20 better than a basic USB-C headphone adapter?
A basic adapter is mainly for simple audio output. D20 adds a dedicated ES9038Q2M DAC, 3.5mm and 4.4mm headphone outputs, an OLED display, an ALPS rotary knob, and stronger output capability for a more serious wired listening setup.
What headphones can I use with D20?
D20 supports wired headphones from 8-300Ω. You can use everyday 3.5mm single-ended earphones or upgraded 4.4mm balanced headphones and cables.
What is the difference between the 3.5mm and 4.4mm outputs?
The 3.5mm output is for standard wired earphones and headphones. The 4.4mm balanced output provides higher output level, up to 4Vrms, for headphones or balanced cables that need extra drive.
How much output power does D20 provide?
D20 is rated up to 125mW + 125mW at 32Ω from the 3.5mm single-ended output and up to 380mW + 380mW at 32Ω from the 4.4mm balanced output, based on the current D20 specification sheet.
What Hi-Res audio formats does D20 support?
D20 supports high-resolution playback up to PCM 32bit / 768kHz and DSD512, depending on your source device, music app, and audio files.
What do the OLED display and ALPS knob do?
The 0.96-inch OLED display shows playback or device status at a glance, while the ALPS rotary knob gives you tactile control for volume and menu operation. It helps you see and adjust key settings without relying only on your phone.
Does D20 need to be charged?
No. D20 has no separate battery to charge. It draws power directly from the connected phone, tablet, or computer, so you can plug in and listen without managing another device.
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