Fosi Audio MD3: a portable headphone DAC/amp built around the ES9039Q2M chip, with a magnetic body that rides on the back of a phone and an LCD that shows sample rate and gain at a glance. It's the on-the-go pick for phone listeners who want more than the handset's own output.
Who the Fosi Audio MD3 is for
Phone listeners: Built for people who want more than a phone's own output but not a brick strapped to the handset.
On-the-go listening: The magnetic body lets the MD3 ride on the back of a phone, so the two move as one unit.
Listeners who like to see their settings: The LCD confirms sample rate and gain at a glance instead of leaving you to guess from LED colors.
Fosi Audio MD3 key specs
DAC chip: ES9039Q2M
Mounting: Magnetic body, rides on the back of a phone
Display: LCD (sample rate, gain)
Type: Portable headphone DAC/amp
Colors: Black, Silver
Genuine stock, 1-year warranty. Free shipping on every order, 45-day returns.
Fosi Audio MD3 vs similar options
vs SMSL DS20: A dongle built on the CS43131 chip with MQA decoding; pick the MD3 for an ES9039Q2M chip, a magnetic phone-mount body and an LCD showing sample rate and gain.
vs FiiO KA17: Dual ES9069Q DACs and THX AAA 78+ amps, rated up to 650mW per channel at 32Ω balanced in Desktop Mode; pick the MD3 for a magnetic body that rides on your phone.
vs Shanling UA4: A 20-gram ES9069Q dongle with an OLED display and 211mW from its 4.4mm balanced output at 32 ohms; choose the MD3 for the ES9039Q2M chip and a magnetic body that mounts on a phone.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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