Aren't the "split" cables made by running the power leg down a separate insulated conductor path, and only connected at both ends?
Lee
Lee
Aren't the "split" cables made by running the power leg down a separate insulated conductor path, and only connected at both ends?
Lee
Aren't the "split" cables made by running the power leg down a separate insulated conductor path, and only connected at both ends?
Lee
Aren't the "split" cables made by running the power leg down a separate insulated conductor path, and only connected at both ends?
each LightSpeed cable goes through a very thorough final test and measurement. We include each cable's unique test report in the box.
Here's a PDF test report for one of the last prototypes before we went into production.
I'm not sure I quite understand the question, Julf. Can you be a little more specific?
Well, the measurements show, at at minimum, that the cable performs as specified. But in your measurements, have you found any correlation between the measured parameters and actual changes in sound, and if so, what effect do the diffeernt parameters have? As an example, you measure the absolute impedance - but would having a 70 ohm impedance instead of 90 change the sound, and how?
So in the test report and my point of view, digital related parameters, more accurate to its original specs it should be, the better.
Impedance needs to be as close as possible to 90Ohm. When there is a very close to perfect match. I think what Bruce found in sound quality improvement will show up.
Larry,
In principle, yes.
Unfortunately 90 ohm is not exactly right - it is just right on the average. If the USB standard specifies an allowed tolerance of +- 10 %, the computer end of the interface might be
81 ohm or 99 ohm. If it is 81 ohm, then a cable with an impedance of 81 ohm would supposedly sound better than one with 90 ohm. Same goes with the DAC end, of course.
So target precisely at 90Ohm I think still the best way to make the USB cable, because we can not control what connectors they use.
Soooo... no one has a recommendation for me, as described in the original post?
Your best bet would be to contact "The Cable Company". They have dozens of USB cables they will loan you at all price points. Use what's best for your system and ears. It's the only way!
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