@bimmer: Cool. Just as an aside, for my system, the cables that made the biggest improvements are in the following order of significance:
1. Power (the metallurgy of the plug blades and IEC make the difference, not the purity of the copper wire).
2. Analog ICs between preamp/poweramp and DAC/line preamp.
Digital cables don't make a sharp impact in my system.
cheers,
I agree, digital cables are not a "huge" deal, but if you can improve your SI of your USB system then you will be good to go. The USB regen Amber seems to be the best option I know of. Fixes issues of most USB cables.
I use Pangea ac14se power cables and they do help. As well as ps audio ps300 ac regenerator. Clean power is key. Helps a bit and it's far from a subtle change. It's quite dramatic.
Recently I have upgrade my source from my PC with Paul pangs USB V3 card. Using the oven controlled crystal oscillator.
My audio-Gd master 11 amp/Dac is attached to a modded gustard u12 (teradak lps powered) and using i2s hdmi (.5meter dhlabs pure silver cable). The onboard amanero combo 384 USB is pretty damn good though. I have that being fed by an eifidilty USB pcie card and powered by teradak lps.
I like toys and spend more on power upgrades and never have spent too much on digital cables. They just don't matter short of being properly shielded, a close tolerance 90ohm impedance and that's it.
Power cables have a ton of hype too. But good pcocc connectors make a diff in some systems.
Our outlets suck, usually upgrading wire from the breaker and replacing the outlet with an audio grade red copper outlet will help.