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Expected Launch date: July 2026  

Estimated Retail Price: 950 USD

FiiO K17 R2R desktop DAC and headphone amplifier

The FiiO K17 R2R is a desktop DAC and headphone amplifier built around FiiO’s proprietary 24+5-bit segmented R2R PRO resistor array. A fully balanced audio architecture, discrete Class AB headphone amplification, network streaming support, and a 3.93-inch touchscreen combine with real wood side panels to create a component designed for both critical headphone listening and integrated desktop audio systems.

Proprietary R2R PRO conversion

The in-house developed 24+5-bit segmented R2R PRO architecture combines a thermometer-decoded upper stage with a precision resistor network. This approach reduces cumulative decoding errors while preserving the natural tonal character associated with R2R designs. The result is a presentation that is smooth, detailed, and rich in texture while maintaining strong resolution and dynamic range.

Real wood and aluminum construction

The K17 R2R pairs a precision-machined aluminum chassis with imported ash or black walnut side panels depending on finish. Natural wood grain gives each unit a unique appearance while the multi-knob control layout and ventilated chassis contribute to practical daily operation.

Network streaming and local playback

Support for Roon Ready, AirPlay, Qplay, NAS playback, SMB, and NFS allows access to both streaming platforms and locally stored music libraries. The FiiO Control app provides direct access to network storage for convenient management of high-resolution music collections.

Eight operating modes

The K17 R2R functions as a streaming receiver, local media player, USB DAC, Bluetooth DAC, optical DAC, coaxial DAC, single-ended analog preamplifier, and balanced analog preamplifier. This flexibility allows it to integrate into a wide range of headphone and speaker systems.

Professional PEQ processing

A dedicated DSP platform enables 31-band lossless parametric equalization with support for gain, Q-factor, limiter, compressor, DRC, and DRE adjustments. PCM signals from 44.1kHz to 96kHz can be processed without sample rate conversion, preserving signal integrity while providing extensive tuning control.

AUTO EQ integration

AUTO EQ automatically applies headphone compensation profiles to simplify frequency-response correction. Users can further customize presets or create their own tuning profiles and share, import, or export EQ settings.

Discrete Class AB amplification

The discrete amplifier stage combines operational amplifiers with triode-style current amplification using ON Semiconductor MJE243G and MJE253G transistor pairs. Balanced output reaches 4000mW + 4000mW at 32 ohms, providing substantial power for demanding headphones.

Fully balanced signal path

From digital conversion through I/V conversion, low-pass filtering, and amplification, the entire signal path uses a fully differential architecture. This design reduces crosstalk and supports wide dynamic range performance.

Isolated internal architecture

Dedicated sub-boards separate the power supply, digital circuitry, and analog circuitry. Physical isolation helps reduce interference and preserves signal accuracy throughout the audio chain.

Advanced power supply design

A custom 35W low-noise linear power supply works alongside five 4700μF capacitors to provide stable current reserves. Separate analog and digital power rails and additional ultra-low-noise regulation stages further improve isolation and consistency.

Precision clocking system

Two Accusilicon femtosecond crystal oscillators and a dedicated FiiO low-phase-noise oscillator help reduce timing errors across multiple sampling rates, supporting accurate digital audio reproduction.

Premium internal components

Nichicon, ELNA, Panasonic, Neutrik, sapphire solid-state capacitors, and silver-plated oxygen-free copper interconnects are used throughout the design to support long-term reliability and signal integrity.

Dual-core system control

An X2000 processor works alongside an ESP32-S3 controller to manage playback, networking, user interface functions, and system operations while maintaining responsive performance.

Touchscreen and remote operation

A 3.93-inch touchscreen provides direct access to settings, playback controls, and EQ functions. Five dedicated control knobs and the included aluminum infrared remote offer additional ways to manage the device.

Wired and wireless connectivity

Gigabit Ethernet and dual-band Wi-Fi support stable network audio playback, while Bluetooth 5.1 with LDAC, aptX Adaptive, aptX HD, AAC, and SBC expands wireless listening options.

Comprehensive protection systems

Integrated safeguards monitor amplifier temperature, transformer temperature, overload conditions, DC output, and power input current to help protect connected equipment.

Product highlights

• Proprietary 24+5-bit segmented R2R PRO resistor array
  
• Fully balanced DAC and amplifier architecture
  
• Discrete Class AB triode current-driven headphone amplifier
  
• 4000mW + 4000mW balanced headphone output at 32Ω
  
• 31-band lossless PEQ with AUTO EQ support
  
• Roon Ready, AirPlay, Qplay, NAS, SMB, and NFS support
  
• 3.93-inch touchscreen display
  
• 35W low-noise linear power supply
  
• Bluetooth 5.1 with LDAC and aptX Adaptive
  
• Aluminum remote control included

Specs

• DAC Architecture: FiiO proprietary R2R PRO
  
• Main Controller: X2000
  
• USB Controller: XMOS XU316
  
• Bluetooth Chip: Qualcomm QCC5125
  
• Display: 3.93-inch touchscreen LCD
  
• Dimensions: 9.65 x 8.78 x 2.72 in (245 x 223 x 69 mm)
  
• Weight: 6.39 lb (2900 g)
  
• USB DAC Resolution: Up to 768kHz/32-bit, DSD256 Native
  
• Local Playback: Up to 384kHz/32-bit, DSD256
  
• Streaming Playback: Up to 384kHz/32-bit, DSD256 DoP
  
• Coaxial Input: Up to 192kHz/24-bit, DSD64
  
• Optical Input: Up to 96kHz/24-bit
  
• Coaxial Output: Up to 192kHz/24-bit, DSD64
  
• Optical Output: Up to 192kHz/24-bit
  
• Balanced Output Power: 4000mW + 4000mW at 32Ω
  
• Single-Ended Output Power: 1850mW + 1850mW at 32Ω
  
• Balanced Output Power at 300Ω: 950mW + 950mW
  
• Single-Ended Output Power at 300Ω: 240mW + 240mW
  
• RCA Output: 2.5Vrms + 2.5Vrms
  
• XLR Output: 5Vrms + 5Vrms
  
• Frequency Response: 20Hz–90kHz
  
• Signal-to-Noise Ratio: ≥125dB (A-weighted)
  
• Noise Floor: <2.6μV (A-weighted)
  
• THD+N: <0.005%

What’s included

• K17 R2R Main Unit x1
  
• AC Power Cord x1
  
• USB Cable x1
  
• Headphone Adapter x1
  
• Remote Control x1
  
• Fuse x1
  
• XLR4 Decorative Plug x1
  
• Batteries x2 (regional availability varies)
  
• Warranty Card x1
  
• Quick Start Guide x1