Excerpt: The ASUS Xonar Essence ST is quite impressive when it comes to overall performance. Signal-to-noise ratios (SNRs) give you a ballpark figure of the sound quality and tell you a lot about a sound card . Both the output and input SNRs are around 118 dB, which is very impressive when compared to many of the other sound cards on the market. The harmonic distortion is extremely low at only 0.0003 percent for its overall output and 0.0002 percent for input.
Pros: The output and input SNR is well above the standard.
Cons: The card does not have basic 3.5mm audio ports.