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DigitalDACsHeadphone AmplifiersDiscontinued
Estimated price (community-sourced)
$86
Around — community and catalog average, updates slowly
About the K3
The FiiO K3 is a compact, USB-powered desktop DAC and headphone amplifier. It uses an XMOS XUF208 USB receiver and an AKM AK4452 DAC, with OPA926 headphone-amplifier op-amps and a TI OPA1612 low-pass filter. It provides 3.5 mm single-ended and 2.5 mm balanced headphone outputs, a 3.5 mm line output, and coaxial and optical digital outputs. Features include selectable high/low gain, a bass-boost switch, and USB Audio Class 1.0 and 2.0 modes.
Specifications
DAC: AKM AK4452; USB receiver: XMOS XUF208; headphone amplifier op-amps: OPA926 ×2; low-pass filter op-amp: TI OPA1612. USB input: USB Type-C; USB Audio Class 1.0/2.0. Supported audio: PCM up to 384 kHz/32-bit; native DSD256. Outputs: 3.5 mm single-ended headphone, 2.5 mm balanced headphone, 3.5 mm line, coaxial digital, optical digital. Headphone output power: 220 mW at 16 Ω and 120 mW at 32 Ω (3.5 mm); 320 mW at 16 Ω and 200 mW at 32 Ω (2.5 mm balanced). Recommended headphone impedance: 16–150 Ω. Frequency response: 20 Hz–80 kHz. Dimensions: 70 × 58 × 22 mm. Weight: 82 g.