Asus announced a new Xonar sound card aimed at audiophiles. Equipped with carefully-selected components, and ASUS’ exclusive Hyper-grounding and EMI Shield design, the Xonar Essence STX is capable of achieving an industry-leading 124dB SNR (Signal-to-Noise Ratio) in signal clarity.

Furthermore the ASUS Xonar Essence STX offers full-driving for any available headphone is provided through the built-in headphone amplifier—presenting unprecedented audio quality and under 0.001% of distortion to satisfy even the most demanding audiophile.
With a top-o-the-line Burr-Brown PCM 1792A Digital-to-Analog Convertor (DAC) to convert audio signals at 127dB signal-to-noise ratios, users will be able to enjoy minimum loss from the process of converting digital signals to analog sound. Additionally, Nichicon "Fine Gold" capacitors deliver rich bass and crystal-clear high frequencies (like the sounds from a piano or violin), allowing the Xonar Essence STX to achieve an amazing <10 Hz–90 kHz frequency response and 124dB dynamic range.

There is no pricing and release date available yet. Via this Asus announcement. See also this early ASUS Xonar Essence STX review.