FiiO K17 Black

Features
Flagship DAC system: Two AK4499EX DAC chips and one AK4191 chip
Output power: 4000 mW balanced output and 4000 mW in ultra-high-gain mode
31-Band PEQ: High-precision parametric equalizer
Advanced power supply: Special, low-noise power supply with separate analog and digital circuits for optimal performance.
Fully symmetrical design: Ensures excellent channel separation and reduced crosstalk, thereby improving overall sound quality.
Multiple inputs and outputs: Supports USB, optical, coaxial, and analog inputs and offers balanced and unbalanced outputs.
Roon Ready certification: Fully compatible with Roon for high-quality music streaming
Touchscreen and remote control: A 3.93-inch LCD touchscreen and the included infrared remote control ensure easy operation.

FIIO K17 – Desktop DAC & Headphone Amplifier
The FIIO K17 is a next-generation desktop DAC and headphone amplifier, combining retro-inspired design with modern high-end audio technology. As the successor to the K9 Pro, it delivers powerful performance, extensive connectivity, and refined sound quality in a compact desktop format.

High-Precision Audio Architecture
The K17 features an M21586Q DSP (64-bit, 360MHz), ES9821Q ADC, and a custom femtosecond crystal oscillator, enabling a lossless 31-band PEQ in all modes while preserving signal fidelity. Built-in protection safeguards connected headphones and audio devices.

Flagship DAC & Amplification
Equipped with AKM’s flagship DAC configuration (AK4191 + 2× AK4499EX), each channel is driven by dual DAC chips for improved channel separation, dynamics, and resolution. A fully discrete Class AB headphone amplifier using ON Semiconductor MJE243/253 transistors delivers up to 4000mW + 4000mW balanced output, easily driving headphones and IEMs with a smooth, natural sound.

Fully Balanced Design
The entire signal path—from DAC and I/V conversion to LPF and dual headphone amplifiers—uses a fully differential circuit with low-noise OPA1612 op-amps, ensuring high dynamic range and minimal crosstalk.

Power & Clocking
A 35W low-noise linear power supply with five 4700µF capacitors, physically separated analog and digital circuit boards, and multi-stage analog regulation ensure clean, stable power delivery. Three ACCUSILICON femtosecond crystal oscillators reduce phase noise for accurate audio reproduction across sampling rates.

Display, Control & Processing
A 7.84-inch color display with a customized Android 12 interface provides intuitive operation. Dual processors (X2000 and ESP32-S3) ensure stable audio processing and a smooth user experience.

Connectivity & Operating Modes
USB decoding up to 768kHz/32-bit, DSD512, MQA (XMOS XU316)
Bluetooth 5.1 with aptX HD, aptX Adaptive, and LDAC (QCC5125)
Optical and coaxial digital inputs
Single-ended and balanced analog inputs
Streaming via Roon Ready* and AirPlay
Local playback from USB storage devices*
Design & Protection
The square-and-circle chassis blends retro aesthetics with efficient heat dissipation and physical controls. Multiple protection systems guard against temperature, overload, DC, and overcurrent conditions.

Network
Gigabit Ethernet and dual-band (2.4G/5G) Wi-Fi provide fast, stable wired or wireless connectivity for lossless audio streaming.

Product specifications
DAC / formats: 2x AKM AK4499EX, 1x AKM AK4191
PCM: up to 768 kHz / 32 bit
DSD: up to DSD512 (native)
Headphone amplifier: Class A/B transistor
Gain selection: Super Big Ear, Big Ear, High Gain, Medium Gain, Low Gain
Unbalanced output (6.3 mm), Super-Big-Ear Gain:
16 Ohm: L+R≥1800mW + 1800mW (THD+N < 1%)
32 Ohm: L+R≥1850mW + 1850mW (THD+N < 1%)
300 Ohm: L+R≥240mW + 240mW (THD+N < 1%)
Frequency response: 20 Hz ~ 90 kHz: Attenuation < 3 dB
Output impedance: <1 ohm
Channel separation: ≥76 dB (1 kHz at 32 ohms)
SNR: ≥124 dB
Symmetrical output (4.4 mm and 4-pin XLR), Super-Big-Ear Gain:
16 Ohm: L+R≥1800mW + 1800mW (THD+N < 1%)
32 Ohm: L+R≥4000mW + 4000mW (THD+N < 1%)
300 Ohm: L+R≥950mW + 950mW (THD+N < 1%)
Frequency response: 20 Hz ~ 90 kHz: Attenuation < 3 dB
Output impedance: <1.5 ohms
Channel separation: ≥119 dB (1 kHz at 32 ohms)
SNR: ≥123 dB
Unbalanced line-out (RCA) power:
Output level: 2.5 Vrms (1 kHz at 10 kOhm)
SNR: ≥121 dB
Channel separation: ≥118 dB (1 kHz at 10 kOhm)
THD+N: <0.00053 % (1 kHz / -10 dB at 10 kOhm)
Balanced power output via line-out (XLR):
Output level: 5 Vrms (1 kHz @ 10 kOhm)
SNR: ≥125 dB
Channel separation: ≥121 dB (1 kHz at 10 kOhm)
THD+N: <0.00045 % (1 kHz / -10 dB @ 10 kOhm)
Display: 3.93 inch LCD touchscreen (240 x 1020 px)
System: Custom Android 12 (no app installation possible)
Equalizer: 31-band EQ
Bluetooth: Qualcomm QCC5125 chipset (AAC / aptX / aptX LL / aptX HD / aptX Adaptive / LDAC)
Power supply: Low-noise 35W linear power supply
Size: 244.6 x 213 x 66.8 mm
Weight: 2.75 kg