FiiO K17 Desktop DAC & Headphone Amplifier – 32-Bit/768kHz, DSD512, MQA, AK4191+AK4499EX*2, 31-Band PEQ, Remote

Overview

The FiiO K17 is a premium desktop DAC and headphone amplifier designed for discerning listeners. Its discrete amplifier circuit uses an OP + transistor current-driving design with the classic MJE243G/MJE253G pair, delivering a smooth, natural, and melodious tone that can pair wonderfully with both large over-ear headphones and compact IEMs.

• Discrete high-current, low-impedance balanced output provides ample headroom (up to 4000mW per channel) for demanding headphones.
• DAC stack uses AK4191 paired with AK4499EX*2, featuring an 8-channel to 4-channel LPF design for improved separation and dynamics.
• Fully separated digital and analog paths with DWA ROUTING technology to purify the background and enhance resolution.

Digital decoding, streaming, and processing

Inside the K17, a professional DSP chip and a high-performance ADC work with a precision clock to deliver clean, accurate sound. The device offers a 31-band PEQ for sophisticated tone shaping across all inputs, enabling you to simulate or refine headphone response curves without altering the source material.

• USB decoding supports up to 768kHz/32-bit, DSD512, and full MQA decoding via an XMOS XU316 controller.
• Bluetooth is powered by the QCC5125 with Bluetooth 5.1, supporting aptX HD, aptX Adaptive, LDAC, and other codecs; streaming is compatible with Roon Ready and AirPlay.

Inputs, controls, and convenience

The K17 provides flexible input options including single-ended and balanced line inputs, plus USB, Bluetooth, optical, and coaxial decoding. A 3.93-inch LCD screen keeps settings within easy reach, while five independent control knobs and a dedicated remote enable fast, intuitive adjustments—volume, gain, and output settings—whether you’re at your desk or across the room.

• Local playback from external USB drives or portable hard drives expands your library without extra software.
• Remote control streamlines operation from a distance, making it practical for living rooms or dedicated listening spaces.

What you may notice as a listener

The combination of robust DAC technology, a high-performance amplifier stage, and a versatile PEQ gives you room to tune your system toward a more balanced, opened-up soundstage. While outcomes vary by headphone model and room setup, the K17 offers tangible possibilities for clarity, separation, and tonal control that can compliment a wide range of listening preferences.