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USB cables are still a “novelty”, although we use them for years connecting a printer, camera, mouse, keyboard, etc, to our computer, sometimes also portable players. So the USB cable became a part of the computer landscape. But the cables were never as stressed as ever before. What is an USB cable? Such a cable is composed of two runs of cables in shields (four wires in total – the same number as there are connectors in the USB plugs) – one of those runs is used to transmit the signals, the other one is used for the 5VDC power supply. What does this mean? That one of the electromagnetic fields is disrupted by the other. This also means quite substantial vibrations of the structure, especially at the maximum power draw allowed by USB standards, which is 500mA, or 0.5A! Besides that, as we can read in the company materials, and what we can instinctively feel, a computer generates a lot of high frequency noise which comes out together with the voltage. This noise influences the closely placed signal cable, inducing its reflection in it. This influence is fought by shielding the cable runs. But this is only a half-measure. Acoustic Revive has a much better solution to the problem. It is strange, that nobody before AR did not come to such a simple idea! It is sufficient to separate those two cables to get rid of most of the problems. We cannot separate them completely – on the side of the receiver, the USB DAC, or an USB-S/PDIF converter, we have one input, usually a type B (square) one. So when we split the cable to two separate runs, they have to converge there. It can be different on the transmitter side – most PCs, even laptops, have more than one USB port. So on that side, the cables can have separated plugs. Mr. Yoshi Hontai, representing Acoustic Revive outside of Japan, send us both types of cables – the USB-1.0SP (with two plugs on the transmitter side) and USB-5.0PL (with single plugs). Both are made from two, separated, cables – one leads the power, while the other one the signal. The digits in the name represent the length of the cable.
http://www.acoustic-revive.com/english/usb_cable/usb_cable_01.html
http://www.highfidelity.pl/@main-177&lang=en
http://www.acoustic-revive.com/english/usb_cable/usb_cable_01.html
http://www.highfidelity.pl/@main-177&lang=en
