Fosi Audio MD3 MagDac Portable DAC & Headphone Amplifier

MagSafe Convenience: Snap on and go. MD3 attaches securely to your phone, eliminating dangling dongles while delivering effortless HiFi listening wherever life takes you.
Hear More Detail: Powered by the flagship ES9039Q2M DAC, MD3 uncovers subtle details, richer textures, and a more immersive listening experience from every track.
Music Without Limits: The dual USB-C design lets you charge your phone while listening, keeping your music playing through commutes, travel, work, and gaming sessions.
Make It Yours: Upload custom images, emojis, and animations to create a personalized display that makes MD3 as unique as your music collection.
Pocket-Sized Power: With up to 180mW ×2 balanced output, MD3 delivers clean, dynamic sound for modern IEMs, revealing more detail wherever you listen.

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: ≥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
Weight (without cable)
50g (±2g)
Dimensions
70 × 45 × 12 mm (2.76 × 1.77 × 0.47 in)

What‘s in the box？

• Fosi Audio MD3
• User Manual
• USB-C to USB-C Adapter
• Quick Guide