| Name / Model No. |
X7 Mark Ⅱ (FX5321) |
Operating System |
Deeply customized Android 5.1.1 |
| CPU Model |
RK3188 |
No. of cores |
4 |
| CPU operating frequency |
1.4GHz |
DAC |
ESS9028 PRO |
| Keyboard |
Virtual QWERTY keyboard |
Input method |
Touchscreen |
| Special features |
Dual Android / Pure Music operating modes, symmetrical remappable keys, USB DAC, docking connector, etc. |
User Interface |
Android 5.1.1 / FiiO Music |
| Chips used |
SoC:RK3188， DAC：ESS9028 PRO, LPF: OPA1612x2, OP: Customized OPA926x2 |
|
Connectivity
|
| WIFI |
5GHz/2.4GHz IEEE802.11 b/g/n standards supported |
Bluetooth |
Bluetooth V4.1，aptX supported |
| USB |
Micro USB2.0 |
|
|
|
Display screen
|
| Display size |
3.97 inches |
Number of colours |
16.7 million colors |
| Display type |
IPS TFT |
Viewable angle |
178° |
| Resolution |
480×800 |
Pixel density |
233 ppi |
| Touchscreen |
Yes |
|
|
|
Storage
|
| RAM |
2GB |
Total ROM |
64GB |
| Storage expansion type |
Micro SD |
ROM available to user |
About 55GB |
| Maximum storage expansion |
512GB (256GB x 2) |
|
|
|
Buttons and ports
|
| Buttons |
Side buttons + side volume wheel+ touchscreen |
Custom key mapping |
N/A |
| Headphone out |
3.5mm standard headphone output jack |
Balanced output |
Supported (2.5mm balanced headphone jack) |
| Line out/Digital Coaxial out/Optical output |
Standard 3.5mm port (shared LO/Coaxial out) |
USB connection |
Micro USB2.0 (charging / data transfer / docking function / USB DAC) |
|
General
|
| Color |
Titanium |
Dimensions |
about 128.7mm(H)×67.2mm(W)×15.5mm(D) |
| Weight |
about 212g |
Volume control |
120 steps +/- button control (via analog-domain controller |
| Recommended headphone impedance |
16~150 Ω (Headphone out)
16~300 Ω (Balanced out) |
Equalizer |
10-band EQ (±6dB), 9 presets+custom preset, ViPER Effect |
| Bass boost |
N/A |
Treble boost |
N/A |
| Balance control |
10 dB |
Gain control |
Low/High |
| USB DAC |
Up to 192kHz/24bit supported |
|
|
|
Power specifications
|
| USB power adapter |
DC 12/1.5A, 9V/2A, 5V/2A recommended |
Battery |
Internal 3800 mAh High-voltage quick charging Li-polymer battery |
| Charging indication |
via LCD display and pulse LED |
Charging time |
＜100 min (DC 12V/1.5A)
＜2.5 h (DC 5V/2A) |
| Battery indication |
Yes (accurate battery % readings) |
|
|
| Battery Life & Test Conditions |
| 3.5mm headphone output：>8 h |
| Volume |
62 |
Gain |
Low |
| Load |
M3 open earbuds (27 Ω) |
Screen |
OFF |
| Test File |
MP3 44.1kHz/16bit (Download link) |
EQ |
OFF |
| 2.5mm TRRS balanced headphone output：>7 h |
| Volume |
51 |
Gain |
Low |
| Load |
32Ω |
Screen |
OFF |
| Test File |
MP3 44.1kHz/16bit (Download link) |
EQ |
OFF |
|
Others
|
| Firmware Upgrade |
Supported both via zip file(inernal memory or external micro SD card) and OTA |
Font size |
Changeable |
| Third-party apps support |
No limit (recommended to install the apps listed on FiiO Market) |
|
|
|
Line output specifications
|
| THD+N |
＜0.0008% (1 kHz/10kΩ) |
SNR |
≥119 dB (A-weighted) |
| Frequency response |
5 Hz~70 kHz（-3dB） |
Dynamic range |
>114 dB |
| Channel separation |
≥103 dB (1 kHz) |
Line level |
＞1.8Vrms |
| Headphone out specifications (3.5mm headphone out jack) |
| Output power 1 |
≥200 mW（16Ω / THD+N＜1%) |
Output impedance |
＜1.2Ω (32Ω loaded) |
| Output power 2 |
≥150 mW（32Ω /THD+N＜1%) |
Channel separation |
≥73 dB (1 kHz) |
| Output power 3 |
≥17 mW（300Ω / THD+N＜1%) |
THD+N |
＜0.003% (1 kHz) |
| Frequency response |
6 Hz~60 kHz（-3dB） |
Peak output voltage |
＞6 Vp-p |
| SNR |
≥116 dB (A-weighted) |
Max. output current |
＞150mA (For reference) |
| Balanced headphone out specifications (2.5mm TRRS headphone out jack) |
| Output power 1 |
≥380 mW（16Ω / THD+N＜1%) |
Output impedance |
＜1.7Ω (32Ω loaded) |
| Output power 2 |
≥400 mW（32Ω /THD+N＜1%) |
Channel separation |
≥97 dB (1 kHz) |
| Output power 3 |
≥63 mW（300Ω / THD+N＜1%) |
THD+N |
＜0.003% (1 kHz) |
| Frequency response |
6 Hz~60kHz（-3dB） |
Peak output voltage |
＞10 Vp-p |
| SNR |
≥119 dB (A-weighted) |
Max. output current |
＞150 mA (For reference) |
| File format support |
| Lossless: |
DSD：DSD64/128（“.iso”,“.dsf”,“.dff”）
DXD：352.8kHz
APE FAST/High/Normal：384kHz/24bit（MAX）
APE Extra High：192kHz/24bit（MAX）
APE Insane：96kHz/24bit（MAX）
Apple Lossless：384kHz/32bit（MAX）
AIFF：384kHz/32bit（MAX）
FLAC：384kHz/32bit（MAX）
WAV：384kHz/64bit（MAX）
WMA Lossless：96kHz/24bit（MAX）
|
| Lossy compression: |
MP3, AAC, WMA, OGG...
|
