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FIIO Q15 Portable Headphone Amplifier DAC
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FiiO Q15 Portable Headphone Amplifier DAC AK4499EX AK4191EQ XMOS XU316 Bluetooth 5.1 32bit 768kHz DSD512 MQA
FiiO's Q15 portable DAC headphone amplifier is built using top-of-the-range components. Featuring the AKM AK4499EX and AK4191EQ chip combo, a third-generation XMOS XU316 interface and a Qualcomm QCC5125 Bluetooth 5.1 receiver chip, it supports high-resolution streams up to PCM 32bit 768kHz, DSD up to DSD512 and even MQA streams. On the Bluetooth side, the most reliable codecs are also supported, up to aptX Adaptive, aptX HD and LDAC. A handsome IPS color display is integrated into the robust casing for intuitive parameter adjustment, and a comprehensive connectivity interface is available. Indeed, the FiiO Q15 features a USB-C input and a coaxial SPDIF input, as well as two headphone outputs: 3.5mm jack and 4.4mm balanced jack. This enables the FiiO Q15 to meet a variety of needs, whether used with a CD player or your cell phone, all with a consistent power output that rivals that of some desktop headphone amplifiers with a much larger form factor.
FiiO Q15: high-end architecture
The FiiO Q15 circuit is designed on 5 levels (DAC - I/V converter - LPF - gain - headphone amplifier) for exemplary audio signal processing with extended dynamic range. The circuit is designed with variable gain and voltage logic to maximize performance. The different gain and voltage modes enable it to be adapted to any type of high-impedance in-ear or headphone available on the market.
FiiO Q15: carefully selected components
XMOS XU316 USB interface, high-precision crystal oscillators and the TI Cortex M4 processor provide exemplary digital-to-analog signal conversion. Processing of the incoming USB, coaxial and Bluetooth signal relies heavily on the TI Cortex M4 processor for high efficiency and extremely low latency. These components are complemented by the AKM AK4499EX and AK4191EQ chip combo, delivering top-level performance with SNR ≥ 123dB and THD +N < 0.0004%.
FiiO Q15 : Bluetooth 5.1
A Qualcomm QCC5125 Bluetooth receiver chip enables the FiiO Q15 headphone amplifier to receive high-resolution streams wirelessly via various sources such as your computer, smartphone or tablet. High-fidelity Bluetooth codecs are supported: aptX, aptX HD, aptX Adaptative and LDAC. The Q15 is Hi-Res Audio Wireless certified, guaranteeing a high-quality wireless listening experience.
FiiO Q15: significant output power
The conversion stage of the FiiO Q15 portable DAC headphone amplifier uses ultra-low-noise components and numerous capacitors for a clear, transparent final sound restitution. This design enables it to develop up to 1600mW of power at 32 ohm on its balanced 4.4mm jack output, and up to 620mW of power at 3 ohm via its 3.5mm jack output. Moreover, a 5-level gain allows you to adapt the output power to match the characteristics of many headphones and IEMs on the market. The outputs can also be set to a line-out mode for coupling the FiiO Q15 DAC to a Hi-Fi amplifier.
FiiO Q15: a 5500mAH battery for 9h autonomy
A 5500mAh battery provides 9h or 8h of autonomy, whether you use the Q15's unbalanced or balanced output. In addition, a switch enables you to switch the FiiO Q15 to phone mode for optimized operation when paired with your smartphone. Phone mode allows the FiiO Q15 to operate on its internal battery, saving your source's battery.
*For use with a computer, the FiiO Q15 must not be in phone mode.
FiiO Q15: EQ tuning for a personalized listening experience
The Q15 features 7 predefined and 3 customizable EQ presets. This allows you to personalize your listening experience to suit your tastes.
FiiO Q15: a dedicated control app
The free FiiO Control App, available on both Android and iOS, lets you access numerous settings for the Q15 from your smartphone. You can modify the Bluetooth codec, change the operation of the device's LEDs or adjust the balance.
FiiO Q15 overview
| 1 | Phone mode switch |
| 2 | Coaxial input |
| 3 | USB-C input |
| 4 | USB-C charging port |
| 5 | Desktop mode switch |
| 6 | 3.5mm headphone/line jack output |
| 7 | Volume control knob |
| 8 | 4.4mm headphone/line jack output |
| 9 | Volume LED indicator |
Technical characteristics
| Specifications | |
|---|---|
| Product type | Portable DAC headphone amplifier |
| DAC chip | AKM AK4499EX + AK4191EQ |
| USB interface | XMOS XU316 |
| Bluetooth receiver chip | QCC5125 |
| Inputs | 1x SPDIF coaxial 1x USB-C |
| Outputs | 1x 3.5mm headphone/line jack output 1x 4.4mm balanced headphone/line output |
| Supported sampling rates | USB : PCM 32bit 768kHz, DSD512, MQA SPDIF coaxial : 24bit 192kHz, DSD DOP64 |
| Supported Bluetooth codecs | SBC, AAC, aptX, aptX LL, aptX HD, aptX Adaptive, LDAC |
| Gain mode | Ultra high (in desktop mode, the power port is connected to the QC power supply) / super high / high / medium / low gain mode |
| Channel balance | ≤ 0.2dB |
| Recommended headphone impedance | Unbalanced : 8~150Ω Balanced : 8~300Ω |
| Screen | IPS color with adjustable view |
| Battery | Lithium 5500mAh |
| Charging time | 3.5h (PD fast charge) |
| Battery life | 9h: unbalanced output 8h : balanced output |
| PERFORMANCE MEASUREMENT @ 3.5MM HEADPHONE OUTPUT, USB DAC, COAX, ULTRA HIGH GAIN MODE | |
|---|---|
| Output power | L+R ≥ 750mW+750mW (16Ω, THD+N ＜ 1%) L+R ≥ 625mW+625mW (32Ω, THD+N ＜ 1%) L+R ≥ 85mW+85mW (300Ω,THD+N < 1%) |
| SNR | ≥ 123dB (A-weighted) |
| Frequency response | 20Hz~80kHz: damping ＜ 3dB 20Hz~20kHz: damping ＜ 0.1dB |
| Output impedance | < 1Ω |
| Crosstalk | ≥ 72dB |
| Peak output voltage | 14.5Vp-p |
| THD+N | < 0.0005% (1kHz/-9dB @ 32Ω) < 0.0004% (1kHz/-6dB @ 300Ω) |
| Noise floor | ＜3.1uV (A-weighted) |
| PERFORMANCE MEASUREMENT @ 3.5MM HEADPHONE OUTPUT, USB DAC, COAX, SUPER HIGH GAIN MODE | |
|---|---|
| Output power | L+R ≥ 520mW+520mW (16Ω,THD+N<1%) L+R ≥ 400mW+400mW (32Ω,THD+N<1%) L+R ≥ 55mW+55mW (300Ω,THD+N<1%) |
| SNR | ≥ 121dB (A-weighted) |
| Frequency response | 20Hz~80kHz: damping＜ 3dB 20Hz~20kHz: damping＜ 0.1dB |
| Output impedance | < 1Ω |
| Crosstalk | ≥ 72dB |
| Peak output voltage | 11.5Vp-p |
| THD+N | < 0.00045%(1kHz/-7dB @ 32Ω) < 0.0004%(1kHz/-4dB @ 300Ω) |
| Noise floor | ＜3.1uV (A-weighted) |
| PERFORMANCE MEASUREMENT @ LINE OUTPUT JACK 3.5MM, USB DAC, COAX | |
|---|---|
| THD+N | < 0.00042% (1kHz/-4dB @ 10KΩ) |
| Crosstalk | ≥ 105dB |
| SNR | ≥ 123dB (A-weighted) |
| Frequency response | 20Hz~80kHz: damping ＜ 3dB 20Hz~20kHz: damping ＜ 0.1dB |
| Output level | 2Vrms |
| Noise floor | ＜1.6uV (A-weighted) |
| PERFORMANCE MEASUREMENT @ 4.4MM HEADPHONE OUTPUT, USB DAC, COAX, ULTRA HIGH GAIN MODE | |
|---|---|
| Output power | L+R ≥ 635mW+635mW (16Ω,THD+N<1%) L+R ≥ 1610mW+1610mW (32Ω,THD+N<1%) L+R ≥ 340mW+340mW (300Ω,THD+N<1%) |
| SNR | ≥ 123dB (A-weighted) |
| Frequency response | 20Hz~80kHz: damping ＜ 3dB 20Hz~20kHz: damping ＜ 0.1dB |
| Output impedance | < 1.5Ω |
| Crosstalk | ≥ 113dB |
| Peak output voltage | 29Vp-p |
| THD+N | < 0.00055% (1kHz/-14dB @ 32Ω) < 0.0003% (1kHz/-2dB @ 300 Ω) |
| Noise floor | ＜4.8uV (A-weighted) |
| PERFORMANCE MEASUREMENT @ 4.4MM HEADPHONE OUTPUT, USB DAC, COAX, SUPER HIGH GAIN MODE | |
|---|---|
| Output power | L+R ≥ 675mW+675mW (16Ω,THD+N<1%) L+R ≥ 1060mW+1060mW (32Ω,THD+N<1%) L+R ≥ 215mW+215mW (300Ω,THD+N<1%) |
| SNR | ≥ 121dB (A-weighted) |
| Frequency response | 20Hz~80kHz: damping ＜ 3dB 20Hz~20kHz: damping ＜ 0.1dB |
| Output impedance | < 1.5Ω |
| Crosstalk | ≥ 113dB |
| Peak output voltage | 23Vp-p |
| THD+N | < 0.00055% (1kHz/-13dB @ 32Ω) < 0.00025% (1kHz/-4.5dB@300Ω) |
| Noise floor | ＜4.8uV (A-weighted) |
| PERFORMANCE MEASUREMENT @ LINE OUTPUT JACK 4.4MM, USB DAC, COAX | |
|---|---|
| THD+N | <0.00027%(1kHz/-5dB @ 10KΩ) |
| Crosstalk | ≥ 105dB |
| SNR | ≥ 126dB (A-weighted) |
| Frequency response | 20Hz~80kHz: damping ＜ 3dB 20Hz~20kHz: damping ＜ 0.1dB |
| Output level | 4Vrms |
| Noise floor | < 1.8uV (A-weighted) |
| General | |
|---|---|
| Dimensions | 143.5 x 71.75 x 21.75mm |
| Weight | 310g |
| Color | Black |
| Package | 1x FiiO Q15 portable DAC headphone amplifier 1x USB-C to USB-C cable 1x USB-C to USB-A adapter 2x Telephone clamp 1x Storage pouch |
| Input | SPDIF |
| Input | USB |
| Output | Jack 3.5mm |
| Output | Jack 4.4mm |
| DAC / ADC Chip | AK4499EX |
| Max sampling rate | 768kHz |
| Max sampling rate | DSD512 |
| Max sampling rate | MQA |
| Color | Black |
| Class | N/A |
| Networking | No |
| Remote Control | No |
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