A big, It depends. I have found using a very good USB cable from my Mac mini to the DAC did make a difference over a cheaper cable. In this case, I started with Audioquest Coffee and went to a AQ Diamond pure silver cable. The difference came in a smoothness to the sound. It just sounded more refined.
I gave up a long time ago about the why's, I can only say it does.
I always keep cables as short as possible to avoid as much degradation from the cable as possible. I'm now debating on another Diamond FireWire from my outboard memory to the Mac.
The analogue cables from your DAC to the preamp fall into the same camp as any cable from any component.
I agree with the poster above about timing issues. That's why I use an asynchronous DAC.
I gave up a long time ago about the why's, I can only say it does.
I always keep cables as short as possible to avoid as much degradation from the cable as possible. I'm now debating on another Diamond FireWire from my outboard memory to the Mac.
The analogue cables from your DAC to the preamp fall into the same camp as any cable from any component.
I agree with the poster above about timing issues. That's why I use an asynchronous DAC.