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Compact Headphone Amplifier FiiO รุ่น K3 รองรับ USB Type-C DAC

  • For Computers, iOS Devices & More
  • 3.5mm and 2.5mm Headphone Outputs + Line
  • Dual USB Audio Modes
  • Separate DAC & Amp Functions
  • Hi-Res Certified with Velvet Sound Tech
  • Up to 384 kHz / 32-Bit Support
  • DSD256 Support
  • Coaxial and Optical Digital Outputs
  • USB Cable Included
  • Includes 4 Spare Foot Pads




The FiiO K3 is a compact desktop headphone amplifier and USB Type-C DAC designed for use with any compatible USB device and supports USB Audio Class 1.0 (up to 96 kHz/24-bit) and 2.0 (up to 384 kHz/32-bit and DSD256). Designed to provide a hi-fi audio experience, the K3 accurately presents your audio as it was intended by its creators. Certified Hi-Res by the Japan Audio Society, the K3 is equipped with an XMOS USB receiver chip, allowing the device to decode files up to 384 kHz / 32-bit PCM, as well as native DSD256 files. Digital processing is handled by the high-performance AKM AK4452 chip, which boasts 32-bit Velvet Sound technology and fully differential outputs for true balanced output, while two OPA926 op-amps and a TI OPA1612 low-pass filter (LPF) provide low-distortion, low noise, and high output swing with up to 320mW at 16 Ohms from the balanced output.

For analog outputs, a 3.5mm single-ended connector is provided for use with your regular headphones, while a 2.5mm connector is designed for balanced headphones. Additionally, the K3 includes a 3.5mm line output for connecting to monitors or home theater setups. Should your speaker system, amplifier, or external decoder require a digital connection, the K3 is also equipped with RCA coaxial and optical connectors. Other notable features include a bass boost switch, a high/low gain level switch, and an ADC volume control, which ensures the user smooth level adjustments. The FiiO K3 includes a set of extra foot pads and a USB cable.


  • Compact desktop enclosure
  • Two USB audio modes (USB Audio Class 1 & Audio Class 2)
  • PCM 384 kHz/DSD256 decoding
  • Dual headphone outputs (3.5mm unbalanced and 2.5mm balanced) + 3.5mm line output
  • Dual digital outputs with RCA coaxial and optical connectors
  • ADC volume
  • Bass boost
  • High/low gain switch
  • Dual crystal oscillators
  • CNC / anodized / sandblasted aluminum
  • Balance boost output power
  • XMOS USB receiver chip
  • AKM AK4452 processor with 32-bit Velvet Sound technology
  • Low noise op-amps (OPA926 and TI OPA1612)
  • Over-voltage power protection and double-filter circuits for power stability
  • Includes USB cable and extra foot pads
น้ำหนัก 0.165 kg
ขนาด 15 × 9.2 × 3.35 cm
USB Audio Class: UAC 1.0 + UAC 2.0
Frequency Range 20 Hz to 80 kHz
Volume Volume Knob: ADC
Gain L/H
Bass Boost 0/+6 dB
Line Out 1/8″ / 3.5 mm
Headphone Output Headphone Out 1: 1/8″ / 3.5 mm Single-Ended Output
Headphone Out 2: 2.5 mm TRRS Balanced Output
Digital Outputs Coaxial: RCA for 192 kHz, Support DSD64 DOP
Optical Out: Up to 96 kHz
DAC Audio DAC: AKM AK4452
Driver OPAMP: 2 x OPA926
Output Power 1/8″ / 3.5 mm Headphone Output
220 mW (16 Ohms)
120 mW (32 Ohms)

2.5 mm Headphone Output
320 mW (16 Ohms)
200 mW (32 Ohms)

Drive Ability 16 to 150 Ohms
Line Level 1.9 Vrms
DAC 384 kHz/32-Bit
DSD Format DSD256
Signal-to-Noise Ratio (SNR) ≥113 dB
THD + N ≤0.004%
Output Impedance <1.04 Ohms
Crosstalk ≥70 dB (1 kHz)
Max Output Current 81.6 mA
Max Output Voltage 7.39 Vp-p
Indicator LEDs Blue: Sample Rate ≤ 48 kHz
Yellow: Sample Rate >48 kHz
Green: DSD Format
Power USB Bus Powered: 5 VDC 500 mA
Dimensions 2.8 x 2.3 x 0.9″ / 70.0 x 58.0 x 22.0 mm
Weight 2.9 oz / 82.0 g

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