1. K11 R2R main unit *1
2. Power cord *1
3. Power adapter *1
4. USB data cable *1
5. Headphone adapter *1
6. Quick start guide *1
7. After-sales service card *1
Three gain settings with three independent volume curves to optimize listening experience for various headphones and earphones
Additional details
Audio signal path
USB interface processor → digital audio bridge → FPGA → R2R DAC → TIOPA1642 professional operational amplifier (low-pass filter) → NJW1195A volume control → dual SGM8262 operational amplifiers for phase inversion and amplification → single-ended and balanced analog outputs
Equipped with gain control, professional headphone protection circuit, and pop noise elimination system
Balanced 4.4mm headphone output
Single-ended 6.35mm headphone output
Multi-rail professional power supply with 17 low-noise LDO precision voltage regulators and 2 DC-DC converters
Additional details
Provides multiple voltage rails
±9V, ±7.5V, ±6V, 8V, 5.4V, 3.3V, 1.8V, 1.2V
External custom 12V switching power supply for clean and stable power delivery
High-speed, high ripple suppression LDOs ensure power purity and strong driving capability
Custom LCD screen with full RGB adjustable FiiO logo ambient lighting
Six side-emitting LED beads with reflective cavity and mirror film for uniform and bright lighting
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