FiiO K9 Pro
The FiiO K9 Pro is a desktop DAC and headphone amplifier positioned as a flagship in FiiO's desktop line. It uses an AKM AK4499 DAC supporting up to 384 kHz and native DSD256, THX AAA 788+ amplifier modules, a linear power supply with dual femtosecond clocks, and Qualcomm QCC5124 Bluetooth with LDAC, aptX HD, and aptX Adaptive; it offers selectable high/medium/low gain, MQA rendering, and outputs including 4-pin XLR, 6.35mm, 4.4mm balanced, and RCA/XLR line out.
| Frequency response, high | 384 kHz |
| Power handling | 2 W |
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