Description
FiiO's K15 headphone amplifier 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. 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. Built with premium-grade components, an industrial-grade 30W power supply, and advanced control options (touchscreen, knob, remote, and FiiO Control App), the K15 is designed to be a versatile, powerful, and future-proof HiFi centerpiece.
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.
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 |
