Fosi Audio MD3 MagDac brings a MagSafe‑mounted DAC and amp to the iPhone

Fosi Audio, known for its compact desktop DACs, has entered the iPhone accessory market with the MD3 MagDac. The device snaps onto the back of any MagSafe‑compatible iPhone, providing a dedicated headphone amplifier, a high‑resolution digital‑to‑analog converter, and a tiny LCD that doubles as a volume controller.

Core specifications

• DAC chip: ESS SABRE 9018Q2C, supporting up to 32‑bit/384 kHz PCM and DSD64.
• Amplifier: Class‑D, capable of delivering 1.2 W into 32 Ω and 500 mW into 600 Ω loads.
• Outputs:
  • 3.5 mm single‑ended TRS (standard headphone jack).
  • 4.4 mm balanced TRR (for audiophile‑grade headphones).
• Display: 1.28‑inch IPS LCD, 240 × 320 px, shows volume steps, battery level, and can render a static image when idle.
• Power: USB‑C PD 5 V / 3 A for charging the MagDac while it’s in use; draws ~200 mA during playback.
• Controls: 100‑step rotary encoder on the LCD, plus a dedicated mute button.
• Build: Aluminum chassis with a magnetic ring that aligns perfectly with the iPhone’s MagSafe array.
• Colors: Galaxy (silver) and Obsidian (black).
• Price: Expected around US $150, shipping late May.

How it works with iOS

When the MagDac is attached, iOS automatically routes audio through the external DAC. The device appears as a standard USB‑Audio class peripheral, so no additional drivers are required. Volume adjustments made on the LCD are translated into digital gain changes inside the ESS chip, preserving the iPhone’s software volume curve.

The MagSafe connection provides two benefits:

1. Secure attachment – the magnetic latch keeps the amp in place even when the phone is moved.
2. Power sharing – the iPhone can charge the MagDac via the USB‑C port on the amp, eliminating the need for a separate battery pack.

Ecosystem implications

For iPhone users

The iPhone has not included a headphone jack since the iPhone 7, pushing most listeners to Bluetooth or dongles. The MD3 MagDac restores a true analog path without sacrificing the convenience of wireless charging. Users who already own high‑impedance headphones will notice a clearer soundstage and tighter bass because the internal amp can drive loads that the iPhone’s built‑in output cannot.

For MacBook and iPad owners

Because the MagDac uses a standard USB‑C connector, it can be placed on a MacBook or iPad Pro as a desktop DAC/amp. The same 4.4 mm balanced output is available, which is rare for portable accessories. This cross‑device compatibility means you can keep a single high‑quality DAC in your bag and use it across the Apple ecosystem.

Lock‑in considerations

The accessory does not require any proprietary software, but it does rely on the MagSafe magnet ring. Users with older iPhones (pre‑iPhone 12) will need a separate MagSafe adapter or a case with a built‑in ring. That creates a mild barrier for those who have not yet upgraded to a MagSafe‑compatible device, but the trade‑off is a relatively low‑cost entry point into high‑fidelity wired audio.

Alternatives and price positioning

Fosi Audio already offers a non‑MagSafe version, the MD2 DAC, which lacks the LCD and magnetic mount and sells for about US $100. For listeners who only need a DAC without the amp, the company’s MD‑Mini USB‑C stick is priced around US $70. The MD3 MagDac sits between these options, adding the convenience of magnetic attachment and a visual interface for a modest premium.

What to expect at launch

The company has opened a pre‑order page that will open on May 25. Shipping is slated for early June, with the first batch limited to the two color options. Early reviewers have praised the build quality and the clean, detailed sound, especially when paired with balanced headphones such as the Audeze LCD‑2 or Focal Clear.

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If you prefer a purely wireless experience, Apple’s own AirPods Pro 2 still dominate the market, but for anyone who values the tactile control and sonic fidelity of a dedicated DAC, the MD3 MagDac offers a compelling middle ground.

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For the full spec sheet, see the official product page.