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

Introducing the FiiO K17, a premium desktop DAC and headphone amplifier built for listeners who value control, clarity, and a refined listening environment. This model pairs a discrete amplifier circuit with robust current delivery, enabling a smooth, natural sound that can drive both large over-ear headphones and compact in-ear monitors with confidence. The result is a flexible, high-fidelity listening tool designed for home setups, studios, and shared spaces alike.

High-fidelity amplification and headphone drive

The K17 employs a dedicated OP plus transistor current-driving amplifier design, using On Semiconductor’s classic MJE243G/MJE253G pairs. This arrangement delivers high current with low impedance, allowing powerful, controlled performance across a wide range of headphones. Notable for those who seek headroom and musicality, the K17 emphasizes a balanced, full-bodied presentation that remains smooth at higher listening levels.

Premium DAC architecture for clean, detailed sound

At the heart of the K17 are the AKM AK4191 DACs paired with AK4499EX chips (one per channel). An 8-channel to 4-channel LPF design helps reduce common-mode interference, promoting better separation and dynamics. A modern digital/analog split and the newly developed DWA ROUTING technology work together to purify the signal and enhance perceived resolution, contributing to a clearer, more spacious soundstage.

Advanced tuning and flexible input options

The device is equipped with a professional DSP chip and high-performance ADC, along with a quartz-based ultra-low phase-noise oscillator. A 31-band professional-grade lossless PEQ is available across all input modes, enabling precise shaping of the headphone response. This lets you tailor the balance and contour of the sound to suit your personal taste or specific headphones, without relying on broad claims about outcomes.

Broad format support and streaming versatility

Input options span single-ended and balanced line inputs, USB decoding, Bluetooth decoding, optical, and coaxial paths. USB decoding uses a powerful XMOS XU316 engine, delivering up to 768kHz/32-bit PCM, DSD512, and full MQA decoding. Bluetooth uses a QCC5125 module with Bluetooth 5.1, supporting aptX HD, aptX Adaptive, and LDAC. For streaming, Roon Ready and AirPlay are supported, while local playback shines via external USB drives and portable hard drives.

Intuitive interface and hands-on control

A dedicated 3.93-inch LCD screen keeps essential information at a glance, while five independent knobs offer tactile control for volume, gain, and output settings. A one-button standby feature simplifies power management, and an infrared remote provides convenient operation from across the room. These touches make the K17 approachable for daily use, whether in a living space, studio, or office.

• Premium discrete amp design delivers strong current for demanding headphones
• AK4191 + AK4499EX DAC pairing with clean separation and dynamic sound
• 31-band PEQ across all inputs for flexible tone shaping
• Extensive input and decoding options including DSD512 and full MQA via USB
• Roon Ready and AirPlay for versatile streaming, plus local USB playback