
Description
FiiO's new K15 is built with premium-grade components, an industrial-grade 30W power supply, and advanced control options (touchscreen, knob, remote, and FiiO Control App). It is designed to be a versatile, powerful, and future-proof HiFi centerpiece. The K15 pushes the boundaries of desktop HiFi by incorporating a fully differential audio circuit, dual next-generation AKM AK4497S DACs (VELVET SOUND), and a discrete Class AB transistor headphone amplifier stage capable of up to 3000 mW + 3000 mW balanced output.
The K15 employs a fully balanced differential architecture from DAC decoding to amplification, reducing noise, crosstalk, and unwanted harmonic distortion while extending dynamic range. At its core are dual AKM AK4497S DACs, among the first to feature the new VELVET SOUND technology, offering ultra-low distortion, wide signal bandwidth, and natural tonal accuracy. This ensures lifelike detail reproduction across both low and high frequencies, delivering immersive, true-to-life sound.
The K15 integrates a 30W industrial-grade internal power supply (12V-2.5A), low-noise and long-lasting, which can also be replaced by an external DC power supply for even higher performance. The power, digital, and analog sections are placed on physically separate boards, avoiding interference while preserving precision and signal integrity. Its multi-rail analog power stage with 14 LDOs ensures ultra-clean, stable current delivery for DAC, filters, and amplifier stages.
The K15 runs on a multi-core X2000 processor (dual XBurst@2 + micro-core), ensuring powerful signal processing at low power consumption, paired with an ESP32-S3 dual-core processor (240 MHz) for efficient system management. Together, they guarantee stable playback, intuitive navigation, and responsive user control. Blending square and curved elements, the K15 combines retro elegance with modern refinement. Its chassis incorporates a structured grid for efficient heat dissipation, enhanced usability with touch operation, knob control, bundled remote, and full app integration via FiiO Control.
Specifications:
| Product Type | DAC headphone amplifier |
| Enclosure Color | Silver |
| Enclosure Material | CNC aluminum |
| Audio Channels | Stereo |
| Functions | Audio digital to analog converter, headphone amplifier, preamplifier |
| Source | Bluetooth, USB-host |
| Audio Formats | MQA, DSD512 |
| Amplifier Class | AB |
| Audio D/A Converter | 32bit / 768kHz |
| Bluetooth Audio Codec | aptX HD, aptX Adaptive, LDAC, SBC, apt-X LL, aptX, AAC |
| High-Resolution Audio | Yes |
| Equalizer | Yes |
| Digital Sound Processor (DSP) | Yes |
| Audio Specifications | Amplifier - Response Bandwidth - 20 - 80000 Hz |
| Output Channel Qty | 2 channels |
| Output Power (per channel) | 3000 mW |
| Amplifier Output Details | 1400 mW - 16 Ohm - THD <1% - 2 channels (balanced) 3000 mW - 32 Ohm - THD <1% - 2 channels (balanced) 700 mW - 300 Ohm - THD <1% - 2 channels (balanced) 1400 mW - 16 Ohm - THD <1% - 2 channels (single-ended) 1400 mW - 32 Ohm - THD <1% - 2 channels (single-ended) 180 mW - 300 Ohm - THD <1% - 2 channels (single-ended) |
| Maximum Sampling Rate Supported | 768 kHz |
| Equalizer Type | Parametric |
| Equalizer Band Qty | 10 bands |
| Additional Features | Playback from Network Attached Storage (NAS) |
| Interfaces | Bluetooth 5.1, Gigabit Ethernet, Wi-Fi |
| Streaming Services | Roon |
| AirPlay | Yes |
| Smart Phone Capable | Yes |
| Display Type | LCD display - 3.93" - monochrome |
| Functions | Touchscreen |
| Connectors | USB (24 pin USB-C) - front Headphones (phone stereo 6.35 mm) - front Headphones (4.4 mm balanced output) - front Headphones (4 pin XLR) - front RS-232 (24 pin USB-C) - rear USB (24 pin USB-C) - rear Digital audio input (coaxial) (RCA) - rear Digital audio input (optical) (TOSLINK) - rear USB (4 pin USB Type A) - rear Network (RJ-45) - rear Balanced line input (balanced jack 4.4 mm) - rear Audio line-in (RCA x 2) - rear Audio line-out (RCA x 2) - rear Balanced audio output (3 pin XLR x 2) - rear |
| Included Accessories | Remote control, port cover, fuse, 2 USB cables, 3.5 mm to 6.35 mm stereo jack adapter |
| Voltage Required | AC 85 - 305 V (50/60 Hz) |
| Width | 24.46 cm |
| Depth | 21.3 cm |
| Height | 6.68 cm |
| Weight | 2.1 kg |