Elevate your computer’s audio with the FiiO K3’s powerful decoding capabilities. Featuring an XMOS USB receiver chip, this HiFi USB DAC and headphone amplifier delivers crystal-clear sound up to 384kHz/32 bit PCM and native DSD256, rivaling more expensive DACs. The K3’s dual crystal oscillators ensure accurate digital signal processing for further enhanced sound quality. Simply connect the K3 to your computer via USB to instantly upgrade to high-fidelity sound and enjoy your music as intended.The XMOS chip converts USB audio input to digital signals output via coaxial and optical connectors, allowing connection to speaker systems, amplifiers, or external decoders. The K3’s design provides a cohesive tactile experience with a volume knob that blends seamlessly into its body, accompanied by an RGB light indicating the type of digital audio input. Featuring both 3.5mm single-ended and 2.5mm balanced headphone jacks with automatic balanced boost, the K3 caters to diverse listening needs.The 3.5mm line out is driven directly by the OPA1612 op-amp, minimizing sound quality reduction. The adjustable line out output ensures compatibility with various active speakers and external amplifiers. With its high and low gain switch, the K3 is compatible with a wide range of headphones, and the hardware bass boost switch enhances low-frequency dynamics.Built with a robust, all-aluminum black body that has been CNC-machined, anodized, and sandblasted, the K3 offers a premium feel. The combination of the OPA926 and TI OPA1612 op-amps ensures low-distortion, high-resolution sound. The K3’s USB Type-C input provides a reliable connection, complemented by overvoltage protection and a double-filter circuit for stable power supply.The K3 utilizes an ADC volume control to eliminate channel volume imbalances and offers precise volume adjustment. This feature makes the K3 suitable for headphones of varying sensitivity, catering to different listening requirements.
Key Features
- USB Type-C for Reliable Connectivity
- UAC1.0 and UAC2.0 USB Audio Class Support
- ADC Volume Knob for Smooth Volume Control
- Dual Gain Settings for Headphone Compatibility
- 0+6dB Bass Boost for Enhanced Audio





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