The FiiO K11 is a desktop headphone DAC and amplifier with a CS43198 chip, balanced 4.4 mm outputs and 1400 mW of power.

The K11 brings together USB-C, optical and coaxial inputs along with 4.4 mm balanced and 6.35 mm headphone outputs. An RCA line output and a coaxial output, active in USB mode, complete the connections. This set allows the unit to be linked to a computer, a games console or a hi-fi system.
Into 32 Ohm in balanced mode, the output stage delivers 1400 mW per channel. That reserve drives sensitive earphones as readily as headphones that are hard to feed. The signal-to-noise ratio reaches 123 dB A-weighted.
Three gain levels, each with its own volume curve, match the amplification to the impedance of the headphones in use. USB DAC mode runs without a driver on Windows 10 and later, and stays compatible with PS5 and Switch. The multifunction dial handles power, volume and menu navigation.
The slim-profile aluminium chassis slips easily onto a desk, steadied by a non-slip silicone pad. The high-contrast LCD screen shows the sampling rate, the volume, the gain and the output mode. The RGB logo lighting is adjustable in brightness, colour and pattern.
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