Product Features
  • Plays DSD, PCM, & Lossy Files
  • 2 x PCM5242 DAC Chips
  • Doubles as USB DAC up to 192 kHz/24-bit
  • Separated Op-Amp & Filtering Chips
  • Up to 256GB Storage
Our Price $269.00

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Styled in black, the FiiO X3 Mark III is a high-resolution portable audio player with a host of ancillary functions and features. For instance, it can double as an asynchronous USB DAC capable of handling 192 kHz/24-bit PCM files. The player is also Bluetooth 4.1 enabled, though not at the expense of fidelity. Three separate PCBs have been utilised in the construction of this mobile player: one for the digital section, one for analogue amplification, and another for Bluetooth.

The X3 Mark III provides both 3.5mm and 2.5mm jacks. The 2.5mm jack is for use with balanced headphones and can offer you a more detailed listening experience with a wider soundstage. The 3.5mm output, on the other hand, is not just a headphone output. It's also a line output and a coaxial jack that outputs DOP and D2P files. This means you can play both DSD and PCM files without an encoder.

Key Features

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.

Dual DAC Chips
The X3 Mark III provides two high-performance PCM5242 DAC chips. These DAC chips offer a high signal-to-noise ratio, as well as effective noise reduction.

Independent, Separated Chips for a Higher-Res Experience
In the X3 Mark III, the DAC, low-pass filter, and op-amplifier all utilise 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 analogue 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 equaliser settings, or switch between playlists.

Certified Hi-Res Sound
The X3 Mark III has been certified by the Japan Audio Society as a Hi-Res Audio product.

All the Codecs You Can Handle
WAV, APE, WMA, FLAC, ALAC, MP3, and more—they're all supported, lossless and lossy alike.

Bluetooth Enabled
Bluetooth 4.1 is provided thanks to the X3 Mark III's F1C81 chipset, which enables low-latency transmission.

Accepts up to 256GB microSD Cards
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.

Multifunction 3.5mm Output
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.

Additional Features at a Glance

  • 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 centre-wheel design
  • 20% thinner than previous models
  • 126g lighter than previous models
Headphone Impedance16 to approximately 150 Ohms
Display ScreenTFT, 240 x 320
Volume ControlDigital potentiometer, 120 steps
Equaliser10-band, ±6-dB range
Balance5 dB
Gain SelectionHigh/low
Outputs1 x 3.5 mm headphone output jack
1 x 2.5 mm balanced headphone jack
USB DACUp to 192 kHz/24-bit supported
ChipsetSoC: 1 x JZ4760B
DAC: 2 x PCM5242
LPF: 1 x OPA2140
OP: 1 x OPA1622
Dynamic Range≥107 dB (line output)
Line Output Level1.9 Vrms (10 kOhms/1 kHz)
THD+NLine output: ≤ 0.002% (1 kHz)
Headphone output: ≤ 0.002% (1 kHz)
Balanced output: ≤ 0.003% (1 kHz)
SNRLine output: ≥113 dB (A-weighted)
Headphone output: ≥112 dB (A-weighted)
Balanced output: ≥112 dB (A-weighted)
CrosstalkLine output: ≥ 103 dB (10 kOhms /1 kHz)
Headphone output: ≥69 dB (1 kHz)
Balanced output: ≥97 dB (1 kHz)
Frequency Response5 Hz to 70 kHz (-3dB)
Output ImpedanceHeadphone output: <1.4 Ohms(32-Ohm load)
Balanced output: <1.2 Ohms(32-Ohm load)
Max Output VoltageHeadphone output: >6.5 Vp-p
Balanced output: > 7.1 Vp-p
Max Output CurrentHeadphone and balanced output: >145 mA(For reference)
Audio Formats SupportedLossless:
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

DisplayWorking: Blue light
Charging: Red light
Fully-Charged: Green light
Display: Shows detailed battery information
Battery Capacity2350 mAh
Charging Time< 3 hours with 5 VDC, 5 A charger
PowerRecommended: 5 VDC, 2 A
Dimensions114 x 59 x 12.8 mm
Weight126 g
FiiO X3 Mark III Digital Audio Player with Bluetooth 4.1 (Black)
RM Product #:
Lithium-Ion Included