K5 PRO (ESS) Desktop Amplifier & DAC
| General specifications | |||
| Name / Model No. | K5Pro | Hardware solution | DAC: ES9038Q2M，USB: XMOS XU208 |
| Color | Black | Volume Scroll | Potentiometer+ADC Sampling |
| Weight | ≈480g | FiiO Control | Unsupported |
| Bluetooth format indication | Unsupported | Sampling rate indication | Blue：44.1KHz/48KHz Yellow：88.2/96/176/352.8/384/705.6/768KHz Green：DSD64/128/256/512 |
| Firmware upgrade | System firmware and XMOS can be upgraded via USB | Recommended headphone impedance | 16~300Ω |
| Maximum supported sampling rate | 768kHz-32bit/DSD512（USB DAC） | ||
| 192kHz-24bit（COAX） | |||
| 96KHz-24bit（OPT） | |||
| Buttons and interfaces | |||
| Buttons | Toggle switch*2（Gain switch+ Input switch） | USB | B type USB |
| Coaxial in | RCA sockets | Optical in | Optical fiber socket |
| Line out | RCA sockets | Phone out | 6.35mm |
| Power parameters | |||
| Power supply | DC15V 1.5A | Battery capacity | / |
| Audio parameters | |||
| Headphone output performance parameters（6.35mm，UAC/SPDIF IN) | |||
| Output power | Output impedance | ＜1.2Ω | |
| 1250mW(32Ω，THD+N＜1%） | Crosstalk | ≥80dB | |
| 140mW(300Ω，THD+N＜1%） | Output level | 6.4Vrms | |
| THD+N | ＜0.0009%(1kHz/-10dB@32Ω) | SNR | ≥118dB (dbA) |
| Frequency response | 20Hz~50kHz: (-2dB) | Noise floor | Gain=H，＜8uV（dbA） Gain=M，＜6uV（dbA） Gain=L，＜4uV（dbA） |
| 20Hz-20KHz：(-0.2dB) | |||
| Headphone output performance parameters（6.35mm，Line IN) | |||
| Output power | Output impedance | ＜1.2Ω | |
| 1500mW(32Ω，THD+N＜1%） | Crosstalk | ≥64dB | |
| 170mW(300Ω，THD+N＜1%） | Output level | 6.9Vrms | |
| THD+N | ＜0.003%(1kHz/32Ω) | SNR | ≥118dB (dbA) |
| Frequency response | 20Hz-20KHz：(-0.2dB) | Noise floor | Gain=H，＜8uV（dbA） Gain=M，＜6uV（dbA） Gain=L，＜4uV（dbA |
| Line output performance parameters（RCA，UAC/SPDIF/Line IN) | |||
| THD+N | ＜0.0012%(1kHz/-10dB@10kΩ，UAC/SPDIF) | SNR | ≥115dB (dbA) |
| ＜0.0008%(1kHz/10kΩ，Line IN) | Noise floor | ≤3.5uV（dbA） | |
| Crosstalk | ≥95dB (1kHz/10kΩ) | Output level | 2Vrms (1kHz/10kΩ) |
| Frequency response | 20Hz~50kHz: (-2dB) | ||
