USB cable..what do you have.

As I am using a wyred 4 sound DAC-2 with ASYNCHRONOUS USB, the free cable delivered with the unit is just perfect.
With async USB there is no clock signal transferred via the cable, thus transport and interface jitter are non-existent.
In such cases, any USB cable will do.
If the DAC is synchronous adaptive, then the quality of the USB cable will make a lot of difference.
My personal opinion is that synchronous USB is not the best choice in computer audio no matter how good the cable, but I don't want to offend anybody or to hijack the thread and stop here.

I have and enjoy a cryo silver cable made by Audiogoner Acreyes. It is the first premium USB cable I have tried and I think I got lucky. I listen for timing and tonal richness mostly, and it delivered both. Not to mention the price. Acreyes sells them on auction and I got a steal.

I am using Cardas Clear USB and it's great.