| FiiO Q15 Portable DAC & Headphone Amplifier Specifications | |
| General Specifications | |
| Name/Model | Q15 |
| Hardware Solution | DAC: AK4191EQ+AK4499EX, USB: XMOS XU316, Bluetooth decoding: QCC5125 |
| Color | Black/Titanium |
| Volume Control | Volume knob |
| Weight | About 305g |
| Dimensions | About 143.5x71.75x21.75mm |
| MQA | Supports MQA Full Decoder |
| Driver-Free Mode | Supported |
| Gain Modes | Ultra High (Desktop mode, QC power) /Super High/High/Medium/Low |
| Display | 1.30-inch TFT (240x240), bezel-less display |
| FiiO Control | Supports settings through app |
| Status Display | Bluetooth codec, sampling rate, charging status, battery level, volume level, input source, gain level, power mode |
| Sampling Rate Display |
Cyan: 44.1kHz/48kHz Yellow: 88.2/96/176/352.8/384/705.6/768kHz Green: DSD64/128/256/512 Purple: MQA |
| Bluetooth Codec Display |
Blue: SBC Cyan: AAC Purple: aptX/aptX LL Yellow: aptX HD White: LDAC Green: aptX Adaptive |
| Channel Balance | 0.2dB |
| Bluetooth Reception | 5.1 (AAC/SBC/aptX/aptX LL/aptX Adaptive/aptX HD/LDAC) |
| Max Sampling Rate |
USB DAC: PCM 768kHz/32bit, native DSD512 Coaxial: PCM 192kHz/24bit, DoP DSD64 |
| Firmware Upgrade | Bluetooth firmware supports OTA upgrades, XMOS/system firmware supports USB upgrades |
| Recommended Impedance | PO: 8–150Ω BAL: 8–350Ω |
| Buttons and Ports | |
| Buttons | Power button x1, Play/Pause x1, Previous track x1, Next track x1, Encoder knob with confirm x1 |
| USB | Type-C USB2.0 x2 (Black USB for charging/data transfer, Orange POWER IN for charging) |
| Headphone Output | Standard 3.5mm port |
| BAL Headphone Output | Standard 4.4mm port |
| Line-Out Output | Standard 3.5mm port (shared PO) |
| BAL Line-Out Output | Standard 4.4mm port (shared BAL headphone out) |
| Digital Coaxial Input | RCA port |
| Toggle Switch | PHONE MODE switch x1, DESKTOP MODE switch x1 |
| Power Supply Parameters | |
| Power Supply | Supports PD fast charging and ordinary charging |
| Battery Capacity | 5500mAh lithium polymer battery |
| Charging Time | About 3.5h (PD fast charge) |
| Battery Life | 3.5mm headphone out: ≥9h 4.4mm BAL headphone out: ≥8h |
| Audio Parameters | |
| Audio Input | USB decoding, Coaxial decoding, Bluetooth |
| Bluetooth Codec | AAC |
| Gain Level | Super High Gain mode |
| Volume Level | L40 (3.5mm) / L34 (4.4mm) |
| Output Power |
L+R ≥750mW+750mW (16Ω, THD+N <1%) L+R ≥625mW+625mW (32Ω, THD+N <1%) |
| Output Impedance | 1Ω |
| Crosstalk | ≥72dB |