QED Reference High Resolution USB (A-B)

QED Reference High Resolution USB (A-B)

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Description
Reference High Resolution USB
New for 2020 comes an improved and updated QED Reference High Resolution USB cable with a slimmer more flexible profile and enhanced performance.

In common with all our cables, Reference High Resolution USB is informed by the results of our exhaustive research into cable design which was begun in 1995 and recently detailed in the updated Genesis Report. This report sets out the design principles to which we adhere and which resulted in the development of a range of cables which represent the ultimate expression of sound through science without compromise. Each QED cable in its range is based on the flagship model and although they may be variously influenced
by price, size or ease-of-use, each retains the basic original features of that model. This gives even the base cable in each range a sonic advantage over their similarly priced competitors. Reference High
Resolution USB is the state-of-the-art offering from QED and as such represents the pinnacle of our understanding of this complex cable application.

Impedance Controlled Data Lane
QED Reference High Resolution USB uses a tightly controlled, 24 AWG, 99.999% oxygen-free copper twisted-pair featuring low-permittivity, foamed-polyethylene dielectrics, which is uniformly bound by an aluminium/mylar wrap. This arrangement is similar to that used in our high performance HDMI cables and is not usually found in a USB cable.
Ferrite Insulation™ Technology
QED Reference High Resolution USB features a unique integral Zn/Mn floating, ferrite jacket. Using a proprietary process, QED has been able to distribute this radio frequency absorbent material evenly throughout the cable by means of a specially impregnated inner jacket. It is included to absorb high frequency noise signals generated both internally and externally. It works to create a much quieter electrical environment in and around the cable so that jitter within the audio data stream is minimized.
Clean Path Audio™ Technology
Many audio enthusiasts feel that running USB power cables carrying charging currents and PC power supply noise alongside the isochronous audio data stream can have an adverse affect on sound quality. One answer is to remove the power cables altogether but this deviates from the USB specification and can cause inconvenience, especially if the DAC electronics require USB power. Instead, QED Reference data lanes are uniquely electrically isolated by using a double layer shield comprising a 100% aluminium/mylar wrap and shield braid connected to ground.
High Resolution Audio
Although the highest resolution audio stream of 24/192 kHz or more (such as DSD) is well within the maximum data rate capability of the USB 2.0 standard and therefore able to be sent sent over any suitably compatible USB cable, timing error caused by cable attenuation, propagation delay skew and characteristic impedance mismatch will result in increased jitter of the isochronous data stream.
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