General Information
| General specifications | |||
| Name/Model No. | K19 | Hardware solution | DAC: ES9039SPRO*2; USB: XMOS XU316; Bluetooth decoding: QCC5125; AMP: 8-way THX788+ |
| Working mode | USB DAC mode/Coaxial decoding mode/Optical decoding mode/HDMI decoding mode/HDMI ARC decoding mode/Bluetooth receiving mode | ||
| Color | Black/Silver | Weight | About 1800g |
| Dimensions | About 250x225x36.7mm | Volume control type | Knob/Remote control |
| MQA | Support MQA global decoding | Drive-free mode (Switch mode) | Surpported |
| Gain | Ultra high gain/Super high gain/High gain/Medium gain/Low gain | Bluetooth reception (5.1) | SBC/AAC/aptX/aptX LL/aptX HD/atpX Adaptive/LDAC |
| Display | 1.30-inch TFT (240*240) fully laminated screen | Display status indication | Display indication: volume, gain, output mode, working mode, transmission format, sampling rate, EQ, etc. |
| Bluetooth format indication | Surpported | Sample rate indication | Surpported |
| FIIO Control | Surpported | Firmware upgrade | System firmware: upgrade through front panel USB interface XMOS firmware: upgrade via front or rear panel USB interface Bluetooth Firmware: Upgrade via FIIO Control |
| Remote control | Supports infrared remote control (only the delivered remote control is supported) | Sample rate indication (Knob indicator light) | Blue：44.1/48kHz |
| Maximum supported sampling rate | USB decoding: supports up to 768kHz/32bit; DSD512 (Native) | Yellow：88.2/96/176.4/192/352.8/384/705.6/768kHz | |
| Coaxial input decoding: supports up to 192kHz/24bit; DSD64 | Green：DSD64/128/256/512 | ||
| Optical input decoding: supports up to 96kHz/24bit | Magenta：MQA | ||
| Coaxial output: supports up to 192kHz/24bit; DSD64 | Bluetooth format indicator (Knob indicator light) | Bule：SBC | |
| Optical fiber output: supports up to 192kHz/24bit | Cyan：AAC | ||
| HDMI decoding: supports up to 192kHz/24bit | Purple：aptX/aptX LL | ||
| HDMI output: supports up to 192kHz/24bit | Yellow：aptX HD | ||
| HDMI ARC decoding: supports 44.1/48kHz | Green：aptX Adaptive | ||
| Adaptation impedance | PO：8~150Ω | White：LDAC | |
| BAL：8~350Ω | |||
| Buttons and Interfaces | |||
| Buttons | Encoder knob (volume knob with button*1+menu knob with button*1) | USB interface | Type-C USB (data transmission interface*2+RS232 DSP adjustment interface*1) |
| DC power input interface | Φ6.2mm DC socket | Toggle Switches | DC power supply and AC power supply selector switch*1+ground selector switch*1 |
| Digital optical input interface | fiber optic socket | Digital coaxial input interface | RCA socket |
| Digital optical output interface | fiber optic socket | Digital coaxial output interface | RCA socket |
| Balanced output interface | Standard 4.4mm socket*1+XLR4 balanced socket*1 | Headphone output interface | Standard 6.35mm socket |
| Balanced line output interface | XLR3 balanced socket | Single-ended line output interface | RCA socket*2 |
| HDMI interface | HDMI IN interface*1; HDMI OUT(ARC) interface*1 | TRIGGER interface | Standard 3.5mm headphone jack (TRIGGER IN interface*1+TRIGGER OUT interface*1) |
| Power parameters | |||
| Power supply | Support AC 100-240V~50/60Hz; DC 15V/≥3A (choose one of the two) | Battery capacity | None |
| Audio parameters | |||
| Some performance parameters of headphone output (6.35mm output, USB DAC/Coaxial decoding/Optical decoding, Ultra high gain mode) | |||
| Output power 1 | L+R≥4000mW+4000mW（16Ω，THD+N＜1%) | Output impedance | ＜0.6Ω（32Ω） |
| Output power 2 | L+R≥2300mW+2300mW（32Ω，THD+N＜1%) | Crosstalk | ≥75dB (1kHz@32Ω) |
| Output power 3 | L+R≥270mW+270mW（300Ω ，THD+N＜1%) | THD+N | ＜0.0003%(1kHz/-6dB@32Ω) |
| Noise floor | <3.5μV (A-weighted) | SNR | ≥127dB (A-weighted) |
| Frequency response | 20Hz~20kHz: Attenuation <0.2dB 20Hz~80kHz: Attenuation＜3dB | Peak output voltage | ＞22.5Vp-p |
| Some performance parameters of headphone output (6.35mm output, USB DAC/Coaxial decoding/Optical decoding, Super high gain mode) | |||
| Output power 1 | L+R≥2400mW+2400mW（16Ω，THD+N＜1%) | Output impedance | ＜0.6Ω（32Ω） |
| Output power 2 | L+R≥1250mW+1250mW（32Ω，THD+N＜1%) | Crosstalk | ≥75dB (1kHz@32Ω) |
| Output power 3 | L+R≥135mW+135mW（300Ω ，THD+N＜1%) | THD+N | ＜0.0003%(1kHz/-4dB@32Ω) |
| Noise floor | <3.5μV (A-weighted) | SNR | ≥127dB (A-weighted) |
| Frequency response | 20Hz~20kHz: Attenuation <0.2dB 20Hz~80kHz: Attenuation＜3dB | Peak output voltage | ＞17.5Vp-p |
| Some performance parameters of single-ended line output (RCA output, USB DAC/Coaxial decoding/Optical decoding) | |||
| THD+N | ＜0.00032%(1kHz/-0.8dB@10kΩ) | SNR | ≥122dB (A计权) |
| Crosstalk | ≥110dB (1kHz@10kΩ) | Noise floor | ＜1.6μV（A计权） |
| Frequency response | 20Hz~20kHz: Attenuation <0.1dB 20Hz~80kHz: Attenuation＜3dB | Line output level | 2.5Vrms (1kHz@10kΩ) |
| Some performance parameters of balanced headphone output (4.4mm/XLR4 output, USB DAC/Coaxial decoding/Optical decoding, Ultra high gain mode) | |||
| Output power 1 | L+R≥4000mW+4000mW（16Ω，THD+N＜1%) | Output impedance | ＜0.6Ω（32Ω） |
| Output power 2 | L+R≥8000mW+8000mW（32Ω，THD+N＜1%) | Crosstalk | ≥120dB (1kHz@32Ω) |
| Output power 3 | L+R≥1100mW+1100mW（300Ω ，THD+N＜1%) | THD+N | ＜0.0002%(1kHz/-6dB@32Ω) |
| Noise floor | <6μV (A-weighted) | SNR | ≥128dB (A-weighted) |
| Frequency response | 20Hz~20kHz: Attenuation <0.2dB 20Hz~80kHz: Attenuation＜3dB | Peak output voltage | ＞45Vp-p |
| Some performance parameters of balanced headphone output (4.4mm/XLR4 output, USB DAC/Coaxial decoding/Optical decoding, Super high gain mode) | |||
| Output power 1 | L+R≥4000mW+4000mW（16Ω，THD+N＜1%) | Output impedance | ＜0.6Ω（32Ω） |
| Output power 2 | L+R≥5000mW+5000mW（32Ω，THD+N＜1%) | Crosstalk | ≥120dB (1kHz@32Ω) |
| Output power 3 | L+R≥550mW+550mW（300Ω ，THD+N＜1%) | THD+N | ＜0.0003%(1kHz/-9dB@32Ω) |
| Noise floor | <6μV (A-weighted) | SNR | ≥126dB (A-weighted) |
| Frequency response | 20Hz~20kHz: Attenuation <0.2dB 20Hz~80kHz: Attenuation＜3dB | Peak output voltage | ＞35.8Vp-p |
| Balanced line output performance parameters (XLR3, USB DAC/Coaxial decoding/Optical decoding) | |||
| THD+N | ＜0.00025%(1kHz/0dB@10kΩ) | SNR | ≥128dB (A-weighted) |
| Crosstalk | ≥120dB (1kHz@10kΩ) | Noise floor | <2.0μV (A-weighted) |
| Frequency response | 20Hz~20kHz: Attenuation <0.1dB 20Hz~80kHz: Attenuation＜3dB | Line output level | 4.8Vrms (1kHz@10kΩ) |
