$500 USB cable


Someone is trying to sell some fancy (used and 2 ft long) USB cable for $497.50. I am genuinely curious since I am no expert. What does this ultra expensive USB cable do to your audio system (besides transferring digital data)?
jkbtn

"I am guessing you could find a cable as good as the one you mention for less. I mean what are the odds a short usb cable could actually be worth that amount?

just guessing here but my instinct is: avoid"

There's really no reason to avoid a cable like that. You try it first, and then make a decision.

OP,  looks like this is your first USB cable purchase. I would not buy a expensive cable unless you have done A/B comparison.  Try a vendor that allows you to do cable camparison with no hassle returns.  

Music Direct and The Cable Company is a good place to start. Good luck! 

First - the function of the USB cable depends on what component it is plugged into.

1. If the component DOES NOT utilize he power from the USB port, then all the cable is doing is passing data - better quality conductors will improve sound quality

2. If the component DOES use the power provided by the USB port then the cables is sending data and providing power.

In case #2, the best USB cable I have come across is this one...
http://www.ebay.ca/itm/Power-supply-and-USB-cable-separate-audio-signal-cable-/251589388236

By having the power and signal cables separate there is no possibility of noise being induced between the signal conductors and power conductors, since they are separate cable runs

Using the Doukmall cable you can then experiment with different USB power supplies to get the very best SQ.

The better USB cables will employ carious cable geometries (i.e.how the conductors are positioned within the cable) to minimize the noise issue.

e.g.
- tightly twisting the signal conductors together will help minimize the noise
- ensuring there is some "space" between the signal and power conductors again assists in defeating noise.

If you have ever striped the outer insulation off a piece of CAT 5 and CAT6 cables you will see both of these methods have been employed in CAT 6 to improve the throughput.

Hope that helps
I have had a few currently the Audio Quest Diamond it is very good at the harmonic structure  and tonal balance of the song. I have had the 
Wire World Platinum 2 it had slightly better resolution  at the expense of warmth and and density of image. If you have a warm tube system the Wireworld is better
being more neutral.  The Audio Quest Diamond if you want  a bit more warmth  
and image saturation .
audioman58 makes a very nice comparison, but I would add a little to it. With cables, results vary. If you were to evaluate the AQ and WW cables in your system, you may agree with audioman58's assessment, hear something different, or maybe here no difference at all. All 3 scenario's are completely valid. That's why its so important to try them first.