Emotiva Audio XDA-2 USB DAC, Digital Preamp & Headphone AMP Three audiophile-quality components in one: USB DAC, digital preamp, and high-current headphone amplifier. 6 digital inputs (2 coax, 2 To slink, 1 USB, 1 AES/EBU). Plus full 24/192 support for all inputs, including USB. Analog Devices AD1955 multi-bit delta-sigma DAC delivers exceptional performance and superior audio quality. Analog Devices AD1896 asynchronous sample rate converter (ASRC) provides almost total immunity to jitter. Differential Reference balanced design with OPA 2134 precision op amps.