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FiiO X3 Mark III Digital Audio Player

MSRP 199.99
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Balanced Output for a Wider Soundstage

The X3 Mark III gives you the usual 3.5mm single-ended headphone output. However, there’s also a balanced 2.5mm jack that allows you to achieve a more detailed listening experience with a broader soundstage.

Independent,Separated Chips for a High-Res Experience

In the X3 Mark III, the DAC, low-pass filter, and op-amplifier all utilize separate chips to reduce the potential for interference between processes. Such interference could result in an inferior listening experience, which is why FiiO opted for this construction. Three PCBs have been employed, one for digital processing, one for analog amplification, and yet another for Bluetooth operation.

Single-Button Construction

The X3 Mark III gives you a multi-function button, which in one press allows you to access playback controls, change the equalizer settings, or switch between playlists.


  • Power-saving standby and deep-sleep modes
  • Broad in-line controls for fast forward, next, rewind, previous, volume, and more
  • Asynchronous USB DAC capable of supporting 192 kHz/24-bit audio
  • Familiar center-wheel design
  • 20% thinner than previous models
  • 126g lighter than previous models
  • Bluetooth 4.1 is provided thanks to the X3 Mark III’s F1C81 chipset, which enables low-latency transmission.
  • With support for microSD cards up to 256GB, you can carry thousands of songs with you on the move. For instance, you can carry up to 8,000 30MB FLAC files at one time.
  • The X3 Mark III’s line output doubles as a coaxial output for digital sources and is capable of outputting both D2P and DOP, so you can play both DSD and PCM files without an encoder.

In the Box

  • FiiO X3 Mark III Digital Audio Player with Bluetooth 4.1 (Black)
  • High-Current Micro-USB Data/Charging Cable
  • Coaxial Digital Adapter
  • 2 x Screen Protectors (1 Already Affixed)
  • TPU Clear Case
  • Leatherette Case
  • Hi-Res Sticker
Chipset: SoC: 1 x JZ4760B DAC: 2 x PCM5242 LPF: 1 x OPA2140 OP: 1 x OPA1622
USB DAC: Up to 192 kHz/24-bit supported
Max Output Voltage: Headphone output: >6.5 Vp-p Balanced output: > 7.1 Vp-p
Outputs: 1 x 3.5 mm headphone output jack 1 x 2.5 mm balanced headphone jack
Frequency Response: 5 Hz to 70 kHz (-3dB)
Crosstalk: Line output: ≥ 103 dB (10 kOhms /1 kHz) Headphone output: ≥69 dB (1 kHz) Balanced output: ≥97 dB (1 kHz)
Audio Formats Supported: Lossless: DSD:DSD64 (ISO, DSF, DFF) APE (Fast): 192 kHz / 24-bit APE (Normal): 96 kHz / 24-bit APE (High): 96 kHz / 24-bit FLAC: 192 kHz / 24-bit WAV: 192 kHz / 32-bit AIFF: 192 kHz / 32-bit AIF: 192 kHz / 24-bit Apple Lossless: 192 kHz/24 bit Lossy: MP3
Display Screen: TFT, 240 x 320
Output Impedance: Headphone output: <1.4 Ohms(32-Ohm load) Balanced output: <1.2 Ohms(32-Ohm load)
Max Output Current: Headphone and balanced output: >145 mA(For reference)
Weight: 4.4 oz/126 g
Equalizer: 10-band, ±6-dB range
Dynamic Range: ≥107 dB (line output)
SNR: Line output: ≥113 dB (A-weighted) Headphone output: ≥112 dB (A-weighted) Balanced output: ≥112 dB (A-weighted)
THD+N: Line output: ≤ 0.002% (1 kHz) Headphone output: ≤ 0.002% (1 kHz) Balanced output: ≤ 0.003% (1 kHz)
Line Output Level: 1.9 Vrms (10 kOhms/1 kHz)
MSRP $199.99  You Save: 20.0%