Fosi Audio MD3 MagDac Portable DAC & Headphone Amplifier | Pre-order Deposit

Fosi Audio MD3 MagDac Portable DAC & Headphone Amplifier | Pre-order Deposit

$10.00

Small Deposit, Big Surprise

• Your Phone audio upgrade
• MagSafe convenience
• Listen and charge at the same time
• Personalized screen / Gadget feel

Official Launch: May 25

Pre-order Deposit: Galaxy

Galaxy
Obsidian
Launch Price

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Fosi Audio MD3 MagDac Portable DAC & Headphone Amplifier | Pre-order Deposit

Galaxy

$10.00

Portable DAC dongle

Enjoy Lossless Listening
on Your Phone

MagSafe convenience with HiFi sound on the go.

Launch: May 25th (PT)

Why We Built MD3?

Traditional dongle DAC/amps often feel awkward to use—hanging from the phone, pulling on cables, and falling short on true portability. Some units add a screen, but it’s usually limited to basic information like volume, with little presence or purpose.

We wanted to break away from this pattern.

MD3 features a strong magnetic backplate that securely attaches to your phone, while its lightweight, compact design makes it effortless to carry wherever you go. We also adopted a circular display not just to show essential audio information, but to make interaction feel alive. Paired with the Vista Button, it lets you browse a photo album and upload images you love. MD3 represents our pursuit of balance in sound, design, and interaction. We hope MD3 becomes a companion you’ll want to take with you wherever you go.

THE SOUND

What Does MD3 Sound Like?

Built as a HiFi–grade DAC/amp with no compromises in sound, MD3 offers a detailed yet musical listening experience.

Rich in Detail

Faithfully tuned to honor artistic intent and reveal the finest nuances, MD3 supports PCM 32bit/384kHz and native DSD256, with THD+N down to 0.00075% for detailed, lossless listening.

Clean Background

MD3 keeps music free from unwanted noise. Thanks to its aluminum alloy construction and well-engineered circuitry, the noise floor is reduced to 1.7μV, with a signal-to-noise ratio of up to 116dB.

Musical Tuning

Based on ensuring accurate reproduction, the MD3's sound tuning is more natural and enduring. It adds a slightly warm tone, making it more suitable for all-day listening.

PLAYABILITY

Photo Album

MD3 comes with built-in funny animated images and emojis. You can also turn the outer display into your canvas with DIY wallpapers, from family photos to images of your favorite artists.

A LITTLE FUN.

Fun Image Games

Built-in games like dice rolling, spin the bottle add a playful touch. Take a lighthearted break anytime, anywhere—right alongside your music.

Rolling Dice

Wine Bottle

Rock Paper Scissors

JUST SNAP IT ON

Your Phone’s Little Backpack

Sixteen N52 high-strength magnets keep MD3 firmly attached to your iphone. Say goodbye to straps, bulk, and clunky distractions. An aluminum alloy isolation plate separates the PCB from the magnets, so you don’t have to worry about magnetic interference affecting sound quality.

Vista Button

Press to enter the photo album and you can flip through images with ease. After a long day of work, a simple press and its crisp, tactile response offer a small moment of stress relief.

Add A Playful Touch

The grid area beneath the display is designed as a canvas for your creativity—decorate it with stickers you love.

OFFICE. COMMUTE. PLAY.

On-the-Go Listening

Thanks to its compact size and magnetic design, you can take MD3 everywhere. Why not let high-fidelity sound stay by your side?

DESIGN

Maybe this is what the future of DAC/Amp feels like.

Precision-anodized aluminum meets hand-stitched leather. Metal and warmth, in harmony.

Magnetic Backplate

Premium leather back, gentle on your phone and comfortable in hand.

1.28-inch LCD Display

Fully laminated circular display with screen rotation, brightness adjustment, and auto screen-off.

Vinyl-Inspired Texture

Where vintage spirit meets modern craftsmanship — the way HiFi should be.

Refined Aluminum Unibody

Finished with 220-grit zirconium sandblasting for a solid, refined feel that resists fingerprints. And Apple-inspired corner radii with seamless transitions create a clean, natural look.

CNC Dot-Matrix Lettering

Precision logo detailing achieved through 5-axis CNC machining.

COLOR MATERIAL FINISH

Two Bold Finishes

Anodized silver, anodized black. Both with orange leather.

FEATURES

Thoughtful Design

With precision in every detail, MD3 makes listening simple and elegant.

Ultra-Portable

Lightweight at only 50 g, it is designed to go anywhere without holding you back.

0.47 inch Optimized Thickness

Balanced slimness and usability: This thickness prevents bulky headphone plugs from lifting the MD3 slightly off the phone, ensuring magnetic attachment .

100-Step Volume Control

One step too loud, one step too quiet? MD3 delivers finer volume control to find your perfect comfort zone.

Volume Memory

Set the volume once. MD3 automatically remembers it for you.

DONGLE

Easy Control, Charge While Using

Connect the top USB-C port to an external power source, then the bottom USB-C port can charge your phone.

Specifications

Chipset

DAC: ESS Sabre ES9039Q2M

Amplifier Chips: ESS ES9603Q ×4

Input

USB-C(Top): Audio Decoding/Image

Transfer/Charging

USB-C(Bottom): Audio Decoding/Image

Transfer/Firmware Upgrade

Output

3.5mm Single-Ended, 4.4mm Balanced

USB Audio Class

UAC 2.0, UAC 1.0

Max Sampling Rate

UAC 2.0: PCM 32bit/384kHz, DSD256(Native)

UAC 1.0: PCM 16bit/48kHz

Max Output Power

(1kHz, THD+N＜1%)

3.5mm: ≥80mWx2 @32Ω

4.4mm: ≥180mWx2 @32Ω

Frequency Response

20Hz-48kHz(±0.2dB)

SNR

3.5mm: ≥115dB

4.4mm: ≥116dB

Dynamic Range

3.5mm: ≥115dB

4.4mm: ≥116dB

THD+N

3.5mm: ≤0.00075%

4.4mm: ≤0.00084%

Noise Floor

3.5mm:＜1.7μV

4.4mm:＜2.7μV

Headphone Impedance

16-300Ω

Weight(without cable)

50g(±2g)

Dimensions

70x45x12mm

(2.76×1.77×0.47in)

Pre-order Deposit – Rules & Process

1. Pay $10 Deposit (Available Now)

Pay the deposit to lock in your Early Bird Gift Pack.
You may cancel and request a full refund of your deposit at any time before the campaign ends.

🎁 Your Early Bird Gift Pack includes:

Early Bird exclusive discount voucher
Exclusive gift card
300 points
VOL2O (limited quantity, randomly awarded)

📧 Important notes:

Please provide a valid email address – your rewards will be sent there.
To request a deposit refund: send an email from the address you used to place the deposit to shopify@fosiaudio.com. We will process the refund within 2 business days.
After refund, all benefits (including the exclusive discount and any gifts) will be automatically invalidated.

Pay the Remaining Balance – May 25 – May 31

On May 25 (before the official launch), we will send you a reminder email.
Click the unique link in the email to claim your Early Bird discount and complete the remaining payment.
If you are lucky enough to receive a VOL2O gift, we will notify you separately by email as well.

Shipping Starts – From May 26

MD3 units will be shipped in batches starting May 26, based on the order of payment completion.
You can track your delivery status in real time using the provided logistics tracking link.

Fosi Audio MD3 MagDac Portable DAC & Headphone Amplifier | Pre-order Deposit

Enjoy Lossless Listeningon Your Phone

Launch: May 25th (PT)

Why We Built MD3?

Flagship DAC Chip

1.28" LCD Display

Photo Album

Aluminum Alloy Chassis

Premium Amplifier Chips

100-Step Volume Control

Magnetic Backplate

Ultra-Portable

THE SOUND

What Does MD3 Sound Like?

Rich in Detail

Clean Background

Musical Tuning

PLAYABILITY

Photo Album

A LITTLE FUN.

Fun Image Games

Rolling Dice

Wine Bottle

Rock Paper Scissors

JUST SNAP IT ON

Your Phone’s Little Backpack

Vista Button

Add A Playful Touch

OFFICE. COMMUTE. PLAY.

On-the-Go Listening

DESIGN

Maybe this is what the future of DAC/Amp feels like.

Magnetic Backplate

1.28-inch LCD Display

Vinyl-Inspired Texture

Refined Aluminum Unibody

CNC Dot-Matrix Lettering

COLOR MATERIAL FINISH

Two Bold Finishes

FEATURES

Thoughtful Design

Ultra-Portable

0.47 inch Optimized Thickness

100-Step Volume Control

Volume Memory

DONGLE

Easy Control, Charge While Using

Specifications

Pre-order Deposit – Rules & Process

1. Pay $10 Deposit (Available Now)

Pay the Remaining Balance – May 25 – May 31

Shipping Starts – From May 26

Customer Reviews

Enjoy Lossless Listening
on Your Phone

Magnetic
Backplate