Fosi Audio MD3: Magnetic Headphone DAC Amp with LCD Screen & ES9039Q2M Chip

Feature：

1. MagSafe-Style Snap-On Portability
Unlike dangling dongle DACs that tug on your cable and swing off your phone, MD3 locks in place with 16 N52 magnets and weighs just 50g. Snap it on and go—no straps, no bulk, no awkward hangs.

2. Circular Display That Shows More Than Specs
The 1.28" fully laminated round screen doesn't just show bitrates and volume levels—you can upload photos, set wallpapers, and even run animated emojis. Spin the Vista button and turn your DAC into a personal statement piece.

3. Flagship DAC Chip, Hi-Fi From Your Phone
Built around the ESS ES9039Q2M and four ES9603Q op-amps, MD3 hits THD+N as low as 0.00075% with a noise floor of just 1.7μV. Your phone finally gets the black background, wide dynamics, and micro-detail it deserves.

4. Balanced Drive With Real Power
The 4.4mm balanced output pumps out 180mW ×2 at 32Ω, while the 3.5mm single-ended delivers 75mW ×2—enough to drive anything from IEMs to full-size cans up to 300Ω. One device, every headphone covered.

5. Pass-Through Charging While You Listen
Dual USB-C ports mean the bottom handles audio decoding and the top takes external power to charge your phone on the fly. Long flights, daily commutes, late-night sessions—your battery and your sound quality both stay topped up.

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: ≥75mWx2 @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:＜1.7μV4.4mm:＜2.7μV

Headphone Impedance：16-300Ω
Weight(without cable) 50g(±2g)
Dimensions：70x45x12mm
(2.76×1.77×0.47in)