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ASUS Xonar Essence STX II 7.1

Sound card - 7.1, PCIe x1, Dolby Pro-Logic II, S/PDIF output, retail
incl. VAT £265.90
excl. VAT £221.58
Extended warranty + 1 year £26.59 Extended warranty + 1 year
Return products within 60 days £13.30 Possibility to return products within 60 days
Ordered on request within 4 days
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Warranty 24 months Code:  HC603j Product Number:  90YA00NN-M0UA00
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ASUS Xonar Essence STX II 7.1 Ordered on request within 4 days
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ASUS Xonar Essence STX II 7.1

 7.1 channel Hi-Fi quality sound with 124dB SNR is designed for the most demanding users who enjoy high quality sound reproduction and will not be satisfied with a standard sound card or integrated audio chip. Connect the ASUS Xonar Essence STX II 7.1 sound card to the motherboard using the modern PCI Express interface.

Key features:

  • Top quality audio with a signal to noise ratio of 124dB
  • Ultra low distortion
  • Clean and consistent power supply with LDO Hi-Fi controllers and WIMA capacitors
  • The headphone amplifier supports up to 600 Ohm impedance
  • This exclusive set includes three operational amplifiers and a tool for easy adjustment of the sound characteristics
  • MUSES Operational Amplifiers for quality sound

Excellent signal to noise ratio

The STX II model builds on the premium quality of your favourite Xonar Essence ST/STX sound cards. It uses the AV100 audio chip and offers first class design, performance and sound. The 124dB signal to noise ratio (SNR) is 64 times more than conventional integrated sound solutions, and a no less powerful 120dB signal to noise ratio is achieved in the headphone output. Ultra low distortion is acheived by premium temperature compensated crystalline oscillators (TCXO). The power supply is powered by a separate 4 pin Molex connector, and uncompromising sound is provided by LDO Hi-Fi controllers and WIMA capacitors.

First class headphone amplifier

The card boasts a premium headphone amplifier which supports up to 600 Ohm impedance with separate volume control for the IEM headphones. The Essence STX II has a set of three operational amplifiers for quality sound, effects, and includes tools for their installation. Dolby Digital Live, Dolby Headphone, Dolby Virtual Speaker or Dolby Pro-Logic II are also supported. Dolby Digital Live delivers Dolby Digital surround sound with 5.1 channels, Dolby Headphone delivers surround sound through the headphones, Dolby Virtual Speaker adjusts 2 channel and 5.1 channel stereo content to virtual surround sound, and Dolby Pro Logic II transforms high-quality stereo sound into a rich and realistic 5.1 Surround sound.

Parameters and Specifications:

Audio Specifications:
Signal to noise ratio at the output (A-Weighted) (Front Output): 124dB
Signal to noise ratio at the output (A-Weighted) (headphone output): 120dB
Signal to noise ratio at the input (A-Weighted): 118dB
OTHD + N at output at 1 kHz (Front output):> 0.0003% (-110dB)
THD + N at output at 1 kHz (Headphone output):> 0.001% (-100dB)
Frequency Response (-3dB, 16 bits/44.1K): 10Hz to 90kHz
Highest voltage at the output/input: Vrms (Vp-p)

Sound Chip:
ASUS AV100 High-Definition (up to 192kHz/24 bit)
D/A converter: TI Bur-Brown PCM1792A

Sampling and resolution:
Analog Playback: 44.1/48/96/192 kHz - 16/24bit
Analog recording: 44.1/48/96/192 kHz - 16/24bit
S / PDIF digital output: 44.1/48/96/192 kHz - 16/24bit, Dolby Digital
ASIO 2.0: Support 44.1/48/88.2/96/176.4/192 kHz - 16/24bit with very low latency

Inputs and outputs:
1 × Audio Analog Output Front R/L (RCA)
1 x 6.3 mm Audio Line In / Jack (Line-in/Mic-in)
1 x Headphones (6.3mm jack)
1 × Digital Coaxial Output S/PDIF (TOSLink Combo) Supports 192 kHz/24bit
Other connectors are on the card

PCI Express (compatible with X1, X4, X8, X16 PCI Express slots)

Other functions:
Dolby Digital Live
Dolby Headphone
Magic Voice
Dolby Virtual Speaker
Dolby Pro-Logic II

Supported Operating Systems:
Windows 8.1, 8, 7, XP (32/64 bit)

Supplied accessories:
1 × Op-amp swap kit (Special Optical Microchip Remover of Operational Amplifier, 2 × Texas Instruments LME49720 Operational Amplifiers, 1 × MUSES 8820)
1 × 3.5 mm cable adapter for RCA (8-channel)
1 x S/PDIF adapter


ASUS is a symbol of the growth of Taiwan's economy. The firm's beginnings date back to April 2, 1989, when as a small manufacturer of motherboards began his work with a few employees. Today, Asus employs more than 12,500 employees worldwide.

ASUS products can be found in almost every category of the information technology marketplace. ASUS is focused on desktops, laptops, phones, optical drives and components. In the manufacture of motherboards, the company is now the dominant player with a staggering 40% market share.


This product is not an independently functional unit and may require professional installation.

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