FOSI AUDIO K5 PRO DAC Headphone Amplifier

With the K5 Pro, Fosi Audio offers a compact, versatile and affordable DAC / headphone amplifier. With its microphone input on the front panel, the K5 Pro is designed to fit into a desktop installation, although it can easily be integrated into a more conventional audio setup. Indeed, in addition to its headphone output, the K5 Pro has an RCA output, which can be connected to an amplifier or directly to active speakers. Furthermore, the USB-C input is a 2-in-1 socket that can receive data and power the K5 Pro at the same time.

The K5 Pro's amplification stage incorporates a NE5532 OPA and is capable of developing a power of 1000mW at 16Ω and 80mW at 300Ω, while maintaining a harmonic distortion rate below 0.003%. Note that signal amplification also applies to the 3.5mm jack microphone input.

As far as digital/analog conversion is concerned, the K5 Pro accepts input sampling rates of up to 24bit 192kHz for optical and coaxial input, and 16bit 96kHz for USB-C input.