Thông số kỹ thuật của Máy nghe nhạc FiiO X7 Gen 2
| Main Unit | |||
| 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 | ||
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Connectivity |
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| WIFI | 5GHz/2.4GHz IEEE802.11 b/g/n standards supported | Bluetooth | Bluetooth V4.1，aptX supported |
| USB | Micro USB2.0 | ||
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Display screen |
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| 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 | ||
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Storage |
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| RAM | 2GB | Total ROM | 64GB |
| Storage expansion type | Micro SD | ROM available to user | About 55GB |
| Maximum storage expansion | 512GB (256GB x 2) | ||
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Buttons and ports |
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| 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) |
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General |
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| 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 | ||
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Power specifications |
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| 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 |
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Others |
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| 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) | ||
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Line output specifications |
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| 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”） |
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| Lossy compression: |
MP3, AAC, WMA, OGG... |
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