FIIO K15 [Ships from an authorized Japanese retailer] FIO-K15 USB DAC with built-in headphone amplifier and headphones, AK4497S (Silver)

As the successor to the popular K9 model, this model boasts two of AKM's latest DACs, the AK4497S. It boasts a powerful 3000mW output, eight input modes, and an easy-to-use 10-band PEQ. It delivers performance approaching the professional sound quality of the higher-end K17 model, all at a great price. This next-generation headphone amplifier with built-in DAC is a legitimate evolution of the K9, balancing practicality with superior sound quality. FIIO is the first to feature the AK4497S. Rich Detail and Immersion: The K15 is FIIO's first product to feature two AK4497S chips with upgraded "VELVET SOUND" audio technology. These chips deliver low distortion, wide dynamic range, and expanded signal bandwidth with low power consumption. Rich detail in both the low and high frequencies delivers a natural, immersive sound experience. *About VELVET SOUND: VELVET SOUND is the brand that embodies AKM's sound philosophy for new-generation audio products. By leveraging the full potential of audio technology, we aim to achieve "realistic sound reproduction" and deliver an authentic, immersive audio experience without compromise.

Discrete Class AB Headphone Amplifier. Drives Everything from Full-Size Headphones to IEMs: The K15 features a discrete Class AB headphone amplifier circuit that employs an operational amplifier + transistor current amplification design. Featuring a pair of ON Semiconductor's standard transistors, the MJE243G/253G, it generates high current with low output impedance. This discrete circuit delivers up to 3000mW of balanced output, easily driving everything from full-size headphones to in-ear monitors, producing smooth, natural, yet melodic sound.

Supports Streaming, Local, Analog, and Digital. Enjoy a variety of audio sources with one device: ・Streaming Media: Enjoy a variety of streaming services via AirPlay. ・Local Playback: Supports USB external storage* for listening to your own music collection. Single-Ended Line Input: Supports RCA single-ended analog audio input and is amplified by the K15. Balanced Line Input: Supports 4.4mm balanced analog audio input and is amplified by the K15. USB DAC: Equipped with an XMOS 16-core XU316, it supports 768kHz/32-bit, DSD512, and full MQA decoding*. Bluetooth Decoding: Supports SBC, AAC, aptX, aptX LL, aptX HD, aptX Adaptive, and LDAC. Optical Decoding: Supports optical digital input and functions as an optical digital decoder. Coaxial Decoding: Supports coaxial digital input and functions as a coaxial digital decoder. Note: Full MQA decoding is only available when the USB input is set to EQ OFF. MQA is not available when the EQ is set to ON in bypass mode. The maximum current output of the USB-A port is 500mA, suitable for USB flash drives. If you need to connect a portable hard drive, please connect a separate power source. Equipped with a 10-band high-precision lossless PEQ: Equipped with a 10-band high-precision lossless PEQ. Simulate and correct headphone frequency response via the dedicated app or online. Also features EQ curve export, import, sharing, and saving functions. *The PEQ function is effective with USB, coaxial digital, optical digital, Bluetooth, streaming, and local playback.

Multiple protection features ensure a safe listening experience: Automatic protection intelligently detects abnormal conditions and prevents damage to the device, including headphone amplifier temperature protection, output overload protection, overvoltage protection (OVP), output DC protection, and power input overcurrent protection. Enjoy your music with peace of mind.