World’s first audio card with precision clock tuning for perfect audio

Industry-leading 124dB SNR Built-in headphone amp drives every available

headphone with <0.001% distortion Perfectly shielded EMI-free analog output path Swappable Opamp socket Multi-channel upgradable

Xonar Essence ST is the world’s first audio card to focus on precision clock tuning to minimize audio jitter. The result is extensive musical details and lively sound image presented for revolutionary experience.

124dB SNR (Signal-to-Noise Ratio)

Choosing only the best components and finest design, Xonar Essence STX achieves unprecedented 124 dB SNR – 64 times clear than on-board solutions, bringing top-o-the shelf audio experience for audiophiles.

WEAK, DULL,

DISTORTED and

NO DETAILS.

CRYSTAL-CLEAR

and HEAR EVERY

DETAILS !!

Without Headphone Amp With Headphone Amp

Most quality headphones require extra driving power from amplifier to perform their best, otherwise, they distort and lose details.

Xonar Essence STX’s built-in headphone amplifier is ready to drive ANY headphone to it’s full performance stage, with under 0.001% distortion.

You Must Know…

Analog Output

EMI NoiseHyper-Grounding circuitry design

EMI shielding seals all analog output signals perfectly from noise, offering distortion-free audio enjoyment

Independent power for analog signals

Draw additional power from MOLEX ensures the power-sensitive analog signals treated with the cleanest power source

Utilizing multi-layer PCB design to separate audio from noise.

EMI-free analog output path

Essence ST is designed to allow full 7.1 surround enjoyment with future upgrade. The high fidelity Xonar H6 multi-channel extension board sold separately in the future provides 120dB signal-to-noise ratio, offering the ultimate surround sound quality ever in the market.

Xonar H6 multi-channel extension board(sold separately)

Xonar Essence STExtension header

Items Description

Audio Performance

Output Signal-to-Noise Ratio (A-Weighted):124dB for Front-out110dB for Headphone-out

Input Signal-to-Noise Ratio (A-Weighted): 118dB

Output Total Harmonic Distortion + Noise at 1kHz (-3dB) :

0.0003% (-110dB) for Front-out0.001% (-100dB) for Headphone-out

Input Total Harmonic Distortion + Noise at 1kHz (-3dB) :

0.0002% (-113dB) for Line-in

Frequency Response (-3dB, 24-bit/96kHz format):

<10Hz to 90KHz

Output/Input Full-Scale Voltage 2 Vrms (5.65 Vp-p)

Headphone Impedance Optimized for 32~600Ω

Main Chipset

Audio ProcessorASUS AV100 High-Definition Sound Processor (Max. 192KHz/24bit)

24-bit D-A Converter of Digital Sources:Texas Instruments PCM*1 for Front-Out (127dB SNR, Max. 192kHz/24bit)

High Fidelity Headphone AmplifierInstruments 2*1 (120dB SNR, 100dB THD+N @ Vcc±12V, RL=600Ω, f=1kHz)

24-bit A-D Converter for Analog Inputs:Cirrus-Logic CS5361* 1 (114dB SNR, Max. 192kHz/24bit)

Sample Rate and Resolution

Analog Playback Sample Rate and Resolution 44.1K/48K/96K/192KHz @ 16/24bit

Analog Recording Sample Rate and Resolution 44.1K/48K/96K/192KHz @ 16/24bit

S/PDIF Digital Output 44.1K/48K/96K/192KHz @ 16/24bit, Dolby Digital

I/O Ports

Analog Output Jack:RCA jack *2 (Front R / Front L)6.30mm jack*1 (Headphone out)

Analog Input Jack: 6.30mm jack *1 (Shared by Line-In/Mic-In)

Digital S/PDIF Output:High-bandwidth Coaxial/TOS-Link combo port supports 192KHz/24bit

Other line-level analog input (for TV Tuner or CD-ROM):

Aux-In (4-pin header on the card)

Front Panel:Shared by Headphone out / 2 channels out /Microphone in

Multi Channel extension headerConnects to Xonar H6 multi-channel extension card (sold separately in the future) for multi-channel output

Driver Features

Operation System Windows Vista(32/64bit) / XP(32/64bit) / MCE2005

Dolby® technologiesDolby® Digital Live/Dolby® Headphone/Dolby®

Virtual Speaker/Dolby® Pro-Logic II

ASIO 2.0 Driver Support:Supports 44.1K/48K/96K/192KHz @16/24bit with very low latency

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