Asus Essence STX II and Asus Essence STX II 7.1 sound cards. Free Technical Library News

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Asus Essence STX II and Asus Essence STX II 7.1 sound cards

23.03.2014

Asus has introduced "hi-fi level" sound cards, designated Essence STX II and Essence STX II 7.1. These products, according to the manufacturer, are characterized by a signal-to-noise ratio of 124 dB (at the line output) and are equipped with headphone amplifiers with an impedance of up to 600 ohms (at the headphone output, the signal-to-noise ratio is 120 dB).

The frequency response is 10 Hz - 90 kHz, THD + N - 0,0003% (-110 dB).

The manufacturer notes the presence of a separate gain control for headphones, the use of high-quality operational amplifiers (op-amps) Muses 8920 and Muses 8820 with the possibility of replacing them (the kit includes three additional op-amps - two Texas Instruments LME49720 and one Muses 8820, as well as a tool for extracting chips from sockets) .

The Essence STX II 7.1 stands out with its ability to output multi-channel audio (7.1) in analog form via a daughter card. The signal-to-noise ratio at these outputs is estimated by the manufacturer at 120 dB. There are nine op-amps on the daughter board (three LM4562s and six JRC 2114Ds), all of which are replaceable.

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This is not a new idea, we can say that our ancestors have embodied it for thousands of years. However, over the past few decades, large farms have neglected it and relied on a simpler, chemical-intensive method that produces high yields without too much difficulty. For a while, this method worked successfully, delighting farmers with high yields and ease of field care. However, in recent years, fears about the negative consequences of "chemical farming" have become increasingly louder. First of all, it is the threat of catastrophic disease outbreaks in monocultures, the growing demand for nitrogen fertilizers, the spread of pesticide-resistant insects and herbicide-resistant weeds. In addition, many crops produce foods that are literally laced with toxic chemicals.

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