K9 Pro (ESS) Flagship Desktop DAC and Amplifier
- [Supports up to 384 kHz and native DSD256]: The K9 Pro ESS desktop DAC is equipped with the high performance dual ES9038PRO, supporting up to 384 kHz and native DSD256 audio.
- [Support lossless MQA renderer]: The K9 Pro ESS amplifier supports the unfolding of MQA tracks, allowing you to listen to high-resolution audio files that are not only reasonably sized, but also retain master-level sound quality that brings you directly into the recording studio.
- [Bluetooth 5.1 and High Resolution Bluetooth]: The K9 Pro ESS bluetooth headphone amps supports AAC/SBC/aptX/aptX LL/aptX HD/LDAC/aptX adaptive lossless bluetooth formats, it means you could get high resolution sound more convenient.
- [Plentiful playing ways]: ①Front: XLR 4-pin, 4.4mm balanced, 6.35mm single-ended headphone outputs ;②Rear: 4.4mm balanced Line in; coaxial, optical, RCA, XLR out; for more convenient connections to external amps or speakers; ③Side: USB Type-C port, for your player, mobile phone,PC.
- [DAC/AMP combos]: K9 Pro ESS desktop amplifier can drive 600Ω power-hungry headphones. Connect to your pc, players as desktop dac, you also could play with your speaker or external amplifier.
| General specifications | |||
| Name / Model No. | K9 Pro ESS | Hardware solution |
DAC: ES9038PRO*2, USB: XMOS XUF208, Bluetooth: QCC5124, LPF: OPA1612 * 2, volume IC: NJU72315 * 2, AMP: THX AAA 788+ * 2, linear transformer：THAILIN/BingZi |
| Color | Black | Volume Scroll | Potentiometer+ADC Sampling |
| Weight | ≈2750g | Channel balance | L12~R12 (0.5dB per level) |
| Gain | L/M/H | FiiO Control | Surpported |
| Bluetooth format indication | Surpported | Sampling rate indication | Surpported |
| Firmware upgrade | System firmware and Bluetooth version can be upgraded via USB | Deep standby | Long press the multi-function button for about 3s |
| Low battery reminder | / | Dimensions | ≈200x224.5x72mm (excluding feet) |
| Bluetooth transmission | / | Bluetooth receiver (5.0) | AAC/SBC/aptX/aptX LL/aptX HD/LDAC/atpX Adaptive |
| Bluetooth format indicator | SBC: blue, AAC: cyan, aptX HD: yellow, aptX: purple, aptX LL: purple, LDAC: white, atpX Adaptive: green | Charging indicator | / |
| Maximum supported sampling rate | 384kHz-32bit/DSD256（USB DAC） | Recommended headphone impedance | 16~600 Ω |
| 192kHz-24bit (coaxial) | |||
| 96KHz-24bit (optical) | |||
| Buttons and interfaces | |||
| Button | Physical key + toggle switch | USB | Type-C, USB B (data transmission) |
| Single-ended line input interface | RCA socket | Balanced line input interface | 4.4mm balanced socket |
| Spdif in | Optical fiber socket | Digital coaxial input interface | RCA socket |
| Balanced output interface | 4.4mm socket, XLR4 balanced socket | Headphone output interface | Standard 6.35 mm socket |
| Balanced line output interface | XLR3 balanced socket | Single-ended line output interface | RCA socket |
| Power parameters | |||
| Power supply | AC 110-115V~/AC 220-230V~ （Recommended） | Battery capacity | / |
| Charging time | / | PO battery life | / |
| Audio parameters | |||
| Single-ended line output performance parameters | |||
| THD+N | ＜0.00042%(1kHz/10kΩ/dbA) | SNR | ≥123dB (dbA) |
| Crosstalk | ≥115dB (1kHz/10kΩ) | Noise floor | ＜1.9μV（dbA） |
| Frequency response | 20Hz~20kHz (-3dB) | Line Level | 2.5Vrms (1kHz/10kΩ) |
| Balanced line output performance parameters | |||
| THD+N | ＜0.00025%(1kHz/10kΩ/dbA) | SNR | ≥128dB (dbA) |
| Crosstalk | ≥125dB (1kHz/10kΩ) | Noise floor | ＜1.9μV（dbA） |
| Frequency response | 20Hz~50kHz (-1.5dB) | Line Level | 5Vrms (1kHz/10kΩ) |
| Single-ended headphone output performance parameters（6.35mm） | |||
| Continuous undistorted output power 1 | ≥1.1W（16Ω / THD+N＜1%， AUX IN) | Output impedance | ＜1Ω（32Ω） |
| Continuous undistorted output power 2 | ≥2.1W(32Ω/THD+N＜1%，AUX IN) | Crosstalk | ≥75dB (1 kHz/32Ω，AUX IN) |
| Continuous undistorted output power 3 | ≥281mW（300Ω / THD+N＜1%，AUX IN) | THD+N | ＜0.00033% (1 kHz/32Ω/dbA) |
| Noise floor |
＜2μV（dbA，AUX IN) ＜3μV（dbA，UAC/SPDIF/BT IN） |
SNR | ≥129dB (dbA) |
| Frequency response | 20 Hz~50kHz (-1.5dB) | MAX Output Voltage | ＞26Vp-p |
| Balanced headphone output performance parameters（4.4mm/XLR4） | |||
| Continuous undistorted output power 1 | ≥1.1W（16Ω / THD+N＜1%) | Output impedance | ＜1Ω（32Ω） |
| Continuous undistorted output power 2 | ≥2.1W（32Ω /THD+N＜1%) | Crosstalk | ≥114dB (1 kHz，AUX IN) |
| Continuous undistorted output power 3 | ≥1.1W（300Ω / THD+N＜1%) | THD+N | ＜0.0003% (1 kHz/32Ω/dbA) |
| Noise floor |
＜3μV（dbA， AUX IN） 4.5uV(dbA,UAC/SPDIF/BT) |
SNR | ≥123dB (dbA) |
| Frequency response | 20Hz~50kHz (-3dB) | MAX Output Voltage | ＞52Vp-p |
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