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Black in-ear monitors with MMCX connectors and metal shells

FiiO

FiiO FD3 Pro in-ear headset 12mm 1.5T DLC MMCX Black

SKU CH-CMJX-BPCFD

Wired in-ear monitors with a 12 mm DLC diaphragm driver and 1.5 T magnet for high-resolution audio

  • Wireless Type2.4 GHz ISM
  • Flagship-level DLC diamond diaphragm delivers powerful, low-distortion sound
  • 12 mm dynamic driver with 1.5 Tesla magnet for high sensitivity
  • Acoustic prism system eliminates high-frequency standing waves
  • Interchangeable sound tubes let you tune the sound signature
  • 4 GHz ISM wireless connectivity for cable-free listening

Dynamic driver earphones

The FiiO FD3 Pro is a wired in-ear monitor built around a 12 mm dynamic driver with a 1.5 Tesla magnet and a Diamond Like Carbon diaphragm. It connects through a detachable MMCX cable and includes interchangeable sound tubes that change the inner diameter for different tuning. The aluminium-magnesium alloy shell is produced with five-axis CNC machining and hand polishing.

Listeners who want replaceable cables

This model suits users who prefer a wired connection and the ability to swap cables or adjust tonality with the supplied sound tubes. Buyers who need a wireless headset, an integrated microphone for gaming chat, or active noise cancellation should look at a different design.

Fits portable and desktop audio chains

The MMCX connector lets the earphones work with a wide range of aftermarket cables and portable DACs or desktop amplifiers. The high-sensitivity driver reaches loud volumes from low-power sources, freeing the user from carrying a bulky amplifier. The compact shells sit comfortably for long sessions without demanding a specific case or accessory.

Highlights

  • Flagship-level DLC diamond diaphragm delivers powerful, low-distortion sound
  • 12 mm dynamic driver with 1.5 Tesla magnet for high sensitivity
  • Acoustic prism system eliminates high-frequency standing waves
  • Interchangeable sound tubes let you tune the sound signature
  • 4 GHz ISM wireless connectivity for cable-free listening

Specifications

Wireless Type2.4 GHz ISM

Questions about this item

Which connector does the FD3 Pro use so I know if my existing cable fits?

The FD3 Pro uses an MMCX connector, so any cable with MMCX plugs will attach directly.

Will the 2.4 GHz wireless link interfere with my older 2.4 GHz peripherals?

The 2.4 GHz ISM connection operates on the same band as many legacy devices; keeping them a short distance apart usually prevents interference.

How can I confirm the 12 mm driver and 1.5 T magnet are performing correctly after setup?

Play a familiar high-resolution track and listen for clean transients, low distortion and the detailed high-frequency response the DLC diaphragm is designed to deliver.

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