Product Description

Styled in a black finish, the FiiO K3 is a compact desktop headphone amplifier and USB Type-C DAC designed for use with any compatible USB device. It 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 opamps 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 provides smooth level adjustments. The FiiO K3 includes a set of extra foot pads and a USB cable.

Technical Specification

• USB - Type C
• USB Audio Class - UAC1.0 + UAC2.0
• Volume Knob - ADC
• Gain - L/H
• Bass Boost - 0/+6dB
• Line Out - 3.5mm
• Headphone Out 1 - 3.5mm single-ended output
• Headphone Out 2 - 2.5mm TRRS balanced output
• Coaxial Out - RCA for 192kHz, support DSD64 DOP
• Optical Out - Up to 96kHz 
• USB Chip - XMOS XUF208
• USB Driver - ASIO/KS/DS/WASAPI/DSD DOP(Native)
• Audio DAC - AKM AK4452
• LPF OP AMP - TI OPA1612
• Driver OP AMP - OPA926×2
• Output Power 1 - 220mW(16Ω)
  (3.5mm headphone output) - 120mW(32Ω)
  
• Output Power 2 - 320mW(16Ω)
  (2.5mm TRRS balanced headphone output) - 200mW(32Ω)
  
• Line Level - 1.9Vrms
• DAC - 384kHz/32bit
• DSD - DSD256
• SNR - ≥113dB
• THD+N - ≤0.004%
• Frequency Response - 20Hz-80kHz
• Dimensions - 70×58×22mm
• Weight - 820 g

Condition

• Purchased in 2014
  
• Product out of warranty