The FiiO K13 R2R combines high-end technology with elegant design for an audiophile sound that captivates. The fully balanced 24-bit R2R DAC developed by FiiO delivers a distinctly natural sound with impressive spatiality. Immerse yourself in a sound world with the K13 R2R that brings even the finest details to life. With selectable NOS and OS modes, you can enjoy either a faithful, organic reproduction or a high-resolution, highly detailed playback. The integrated 10-band equalizer allows for extensive sound customization for your headphones and preferences—either via app or web interface. EQ presets, frequency corrections, and the ability to save your own EQ profiles make personalization particularly comprehensive. The high output power of the integrated headphone amplifier, up to 2400 mW per channel, ensures that even demanding headphones can reach their full potential. Headphones can be connected symmetrically via 4.4 mm or asymmetrically via 6.3 mm jack. In addition to USB, optical, and coaxial inputs, the K13 R2R offers both XLR and RCA as well as pre-amp outputs, allowing it to be used not only as a headphone amplifier but also as a DAC and preamplifier. It supports high-resolution formats up to PCM 384 kHz / 32 Bit and DSD256. The K13 R2R offers even more: Bluetooth 5.4 with AAC and LDAC enables wireless Hi-Res streaming. The high-resolution LCD display shows all important information at a glance. The integrated RGB lighting with customizable color and pulse tuning in the high-quality aluminum housing emphasizes its modern, elegant character. To ensure the operation is as comfortable as possible, a remote control is included in the package, allowing you to easily control volume, inputs, and functions—whether at your desk or on the sofa in the living room.