A further advantage of the FiiO K19 is its comprehensive connectivity, with numerous digital inputs: USB-C, Toslink optical, SPDIF coaxial, but above all an HDMI port and an HDMI e-ARC port. Outputs include 2 digital outputs, Toslink optical and coaxial SPDIF, as well as various analog outputs: stereo balanced XLR line output, 2x stereo RCA line output, 6.35mm headphone output, 4.4mm balanced headphone output and balanced XLR headphone output. Two 3.5mm Trigger IN/Trigger OUT 12V jack ports complete the package, as does an RS232 interface on a USB-C port. Fiio has opted for an original, aesthetically pleasing case that can be positioned vertically or horizontally, and incorporates a small screen as a control interface.

FIIO K19: two ES9039MSPRO DAC chips

The K19 incorporates two DAC chips for balanced audio channel processing. The ES9039MSPRO DAC chips are 32bit, 8-channel DAC chips specially designed for professional applications. They enable the FiiO K19 to support high-resolution PCM 32bit 768kHz and native DSD streams up to DSD512. In addition, these DAC chips are combined with two ACCUSILLON AS318-B crystal oscillators to guarantee a perfect clock signal.

FIIO K19: two THX AAA-788+ amplifier modules

Headphone amplification is provided by two THX AAA-788+ modules, for exceptional output power of up to 8000mW per channel. As a result, the K19 can drive any type of audiophile headphone on the market, whether with 32 or 600 ohms impedance.

FIIO K19: next-generation Bluetooth

The K19 features a bi-directional Bluetooth chip (receiver/transmitter), enabling it to support the following wireless transmission codecs: SBC, AAC, aptX, aptX HD and LDAC.

FIIO K19: integrated DSP with 31-band EQ

The K19 incorporates an ADI SHARC+ ADSP-21565 DSP from Analog Devices Inc., giving users the benefit of a 31-band parametric equalizer. As a result, the K19's tuning control is extremely precise over a wide range of frequencies. This feature enables the user to adapt the sound to his preferences and the type of music he is listening to.

FIIO K19: dual power supply

A switch allows you to select the power supply mode, either 220V AC mains or 15V DC, to suit various configurations. A grounding switch, also located on the rear of the unit, resolves potential ground loop problems and effectively eliminates noise.