Leading the new ‘core’ generation I high-end AKM DAC AK4497S

The K15 is among the first to use two of the ne high-end AKM DAC chips, AK4479SVQ featuring ti upgraded ‘VELVET SOUND’ audio technology. TI chips achieve low distortion, a wide dynamic rang and extended signal bandwidth, all at low pow consumption. Rich detail is retained in both low ar high frequencies for a natural and immersive sour experience.

Velvet Sound

Velvet Sound is a brand that embodies the sour philosophy of AKM’s new-generation audio products. It air to achieve ‘true-to-life sound reproduction’ by fully utilizi audio technology, delivering an authentic and immersi acoustic experience with no compromises.

Discrete architecture – Class-AB transistor current-boosting headphone amplifier circuit

Within the K15 is a carefully designed discrete headphone amplifier circuit, featuring an OP + transistor current-boosting design. A complementary pair of the classic ON Semiconductor MJE243G/253G delivers high current and low impedance output. This discrete circuit can achieve balanced output power up to 3000mW + 3000mW, allowing the K15 to effortlessly drive both full-sized headphones and in-ear monitors – producing smooth, natural, yet melodious sound.

Eight Operating Modes

• USB DAC – XMOS 16-core XU316, supports 768kHz/32bit, DSD512, MQA full decoding*.
• Bluetooth decoding – Supports SBC/AAC/LDA2 other codecs.
• Coaxial decoding – Receives optical signal input, acting as an optical decoder.
• Coaxial decoding -Receives optical signal acting as an optical de
• Single-ended line input – Receive single-ended analog audio input, amplifying it with the K15.
• Balanced line input – Receive balanced balanced input, amplifying it with the K15.
• Streaming media – Enjoy a wide variety of streaming media sources through Roon Ready and AirPlay.
• Local playback – Supports USB external allowing you to listen to your private collection.

Fully balanced audio circuit

From DAC decoding, low-pass filtering, gain control, and to headphone amplification, the K15’s audio circuit is a fully differential design. Such a design ensures wide dynamic range while also effectively reducing crosstalk, minimizing noise, and enhancing the quality of sound.

Physically separated boards

The internal power supply, digital, and analog sections each lie on separate physical boards, physically preventing crosstalk. This effectively ensures the precision and integrity of processed audio signals, for pure and quality sound.

Clean and Precise Power Supply Section

FiiO K15 features a built-in next-generation 30W(12V~2.5A), low-noise, high-efficiency, long-lasting, industrial and instrumentation-grade power supply. It also supports an external DC power supply, which makes it compatible with external linear power supplies for enhanced performance. FiiO K15 adopts independent power supplies for digital and analogue sections.

Ultra-Low Jitter Crystal Oscillators

FiiO has featured dual independent Accusilicon low-phase noise femtosecond crystal oscillators. They are clocked at 45.158MHz and 49.1520Mhz, they drastically reduce phase noise interference in audio signals and ensure smooth, consistent high-resolution audio signal processing.

Stream Your Favourite Music

FiiO K15 has Roon Ready support and Apple AirPlay 2 support. Users can use both of these functions to freely stream their favourite music anytime they like. The device features an Ingenic X2000 processor chipset that offers a smooth user interface, and we also have a colourful touchscreen display for easy interaction.