Fosi Audio MD3 Portable Magnetic Hi-Res DAC & Amp

Roll over image to zoom in Click on image to zoom

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Security

🔗 Magnetic Design – Snaps securely to your phone
🎵 ESS ES9039Q2M DAC – Flagship Hi-Res audio decoding
⚡ Balanced Output (4.4mm) – Up to 180mW power
🎚️ 100-Step Volume Control – Precise listening levels
🖥️ 1.28” LCD Display – Interactive & customizable
🧠 Volume Memory – Remembers your settings
🎨 DIY Photo Album – Personalize your DAC
🧩 Built-in Mini Games – Fun on the go
🪶 Ultra-Portable (50g) – Pocket-friendly design
🔌 Dual USB-C Ports – Charge while listening

Fosi Audio MD3 Portable Magnetic Hi-Res DAC & Amp

Name: Fosi Audio MD3 Portable Magnetic Hi-Res DAC & Amp
Rating: 4.00 (1 reviews)

Moments Away. Fully Enjoyed.

The Fosi Audio MD3 MagDAC redefines what a portable DAC/amp should feel like. No more dangling dongles or awkward setups—this is a magnetic, ultra-portable Hi-Res DAC & headphone amplifier designed to stay seamlessly attached to your phone.

With a flagship ESS DAC chipset, balanced amplification, and an interactive display, the MD3 delivers not just high-fidelity sound—but a uniquely engaging experience wherever you go.

Why Choose the Fosi Audio MD3 MagDAC?

Traditional DAC dongles compromise on usability. The MD3 breaks that pattern with:

A magnetic backplate that snaps securely to your phone
A lightweight 50g design built for everyday carry
A 1.28” interactive LCD display with personalization features
A refined balance of sound quality, usability, and playfulness

This is not just a DAC—it’s your daily Hi-Fi companion.

Hi-Res Sound That Feels Alive

Flagship ESS DAC Performance

At its core, the MD3 uses the ESS Sabre ES9039Q2M DAC, delivering exceptional resolution with support for:

PCM up to 32bit/384kHz
Native DSD256

Paired with 4× ES9603Q amplifier chips, it ensures powerful, clean, and distortion-free output.

Detailed Yet Musical Tuning

The MD3 is tuned for long listening sessions without fatigue:

Rich Detail: Reveals micro-details and textures in your music
Clean Background: Ultra-low noise floor (as low as 1.7μV)
Natural Warmth: Slight warmth for musical, engaging playback

Whether you’re using IEMs or full-size headphones, the MD3 delivers a balanced, immersive sound signature.

Magnetic Design – Built for Real Portability

Snap it onto your phone like a “little backpack.”

16× N52 magnets for strong, stable attachment
No dangling cables or bulky setups
Aluminum shielding prevents magnetic interference with audio

Perfect for office, commute, travel, or casual listening on the go.

Interactive Display & Smart Features

The MD3 isn’t just functional—it’s fun.

1.28” Circular LCD Display
Custom Photo Album (DIY wallpapers)
Built-in mini games (dice, spin, rock-paper-scissors)
Vista Button for quick navigation
100-step precise volume control
Volume memory for convenience

It adds a personal and playful touch to your listening experience.

Premium Build & Design

Crafted with attention to detail:

Anodized aluminum alloy chassis
Hand-stitched leather finish
Compact size: 70 × 45 × 12mm

A perfect blend of durability, aesthetics, and comfort.

Powerful Output for Any Setup

3.5mm Single-Ended Output: ≥80mW ×2 @32Ω
4.4mm Balanced Output: ≥180mW ×2 @32Ω
Drives 16–300Ω headphones and IEMs effortlessly

Chipset

DAC: ESS Sabre ES9039Q2M
Amplifier: ESS ES9603Q ×4

Inputs

USB-C (Top): Audio decoding / Image transfer / Charging
USB-C (Bottom): Audio decoding / Firmware upgrade

Outputs

3.5mm Single-Ended
4.4mm Balanced

Audio Support

UAC 2.0: PCM 32bit/384kHz, DSD256 (Native)
UAC 1.0: PCM 16bit/48kHz

Output Power

3.5mm: ≥80mW ×2 @32Ω
4.4mm: ≥180mW ×2 @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

Build & Size

Weight: 50g (±2g)
Dimensions: 70 × 45 × 12mm

Warranty Period: 1 Year from the date of Invoice
Covered: Manufacturing Defects Only
Warranty Form: https://www.theaudiostore.in/pages/warranty-claim-form
Cable: 1-month warranty only for manufacturing defects only

Fosi Audio is a dynamic brand dedicated to providing the most comprehensive range of Hi-Fi audio products in the market. We cater to passionate audiophiles by offering Hi-Fi products, DIY kits, and expert guidance, ensuring an immersive audio experience. Beyond a mere transaction, we foster enduring relationships with our clients, supporting them throughout their audio journey.

Our diverse product lineup includes the Hi-Fi power amplifier, pre-amplifier, headphone amplifier, DAC, music player, Bluetooth receiver, DIY board, DIY chassis, and an array of DIY kits. These meticulously crafted offerings embody our commitment to exceptional sound quality and innovation.

Established in China in 2017, Fosi Audio was founded by a team of devoted audiophiles. Our products have gained significant popularity within the Chinese DIY audio community, amassing a large and dedicated following. To expand our reach beyond borders, we launched this website in 2017 and began offering a selection of products on Amazon under the name "Fosi audio." However, please note that many of our outstanding products are not yet available on this website or Amazon. If you cannot find what you're looking for, simply reach out to us via email, and we will be delighted to assist you in finding the perfect product to meet your needs.

At Fosi Audio, we are not just a brand; we are your partner in achieving audio excellence. Join us on this immersive sonic journey and experience the true essence of Hi-Fi audio.

85,000+

Audiophiles Trust TAS

Since 2016

Run & Operated By A Music-Obsessed Team

4.5★ Rated on Google

Trusted For Honest Advice And Reliable Support

60+ Curated Audio Brands

Only What We’ve Tested, Heard, And Truly Believe In

5 stars: 0 (0%)
4 stars: 1 (100%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Silver

osi Audio MD3 Portable Magnetic Hi-Res DAC & Amp - Silver

The product is very well made and looks great. The sound quality at high gain is also very good.
A few issues to Note:
Missing magnetic ring: The magnetic ring was not included in the box, so we couldn’t test the N52 magnetic hold strength.
Orange button: The orange button doesn’t function to go back to the previous screen.
Online custom photo album: The device isn’t connecting to the online custom photo album at https://cc.fosiaudio.com/#/MD3.