I finally had the opportunity to try some silver speaker cables with the Stratos--I'm glad I did, it lead to the most important revelation since buying the Sratos. It's not that I did not have top notch sound with the Groneberg cables, but the bass sometimes felt a little flabby or not perfectly controlled (this was the only weakness that I and my friends could perceive in my system).
The Groneberg is an excellent cable but it cannot compete against silver--a whole new world opened up with the silver cables--the sound became much more transparent, punchy, dynamic, the transients are lightning fast, the silver literally added an octave extension in both ends of the spectrum -- the bass suddenly tightened up; is as rapid as a "shark attack"--grabs and releases fast.
Some people may find silver too aggressive sounding because it is relentlessly revealing and more critical of the the whole audio chain than copper and less forgiving of weak components and faulty recordings.
Changing the interconnects to silver had a similar effect on the sound, it became even more pristine and quick.
I and my friends concluded that pure silver cables are a perfect match for the Stratos and push this wonderful amp to new heights.
This raises the question whether it is worth replacing the internal wiring for silver--logic suggests yes, since this way complete synergy could be achieved in the signal path.
I have a friend who uses silver all the way in his tube gear, including the power cord, the internal wiring of the transformers--the sonic results are breathtaking.
Some systems may sound harsh and lean on silver and these systems will need to be scrutinized for weak links/components. If the components are top notch and everything is matched perfectly, silver will unleash the full sonic potential of the system.
Some of you may disagree but I would recommend trying it out yourselves; you may be in for a tremendous surprise.
Zoltan
The system: 2 Odyssey Stratos Stereo, driven in bridged mode; Sony XE930 CD with mods, battery powered; Audyssey APS 5+2 speakers (not only a namesake of the Stratos, but a perfect match as well), custom-made pure silver biwire speaker cables and interconnects
P.S. I plan to retire the Groneberg cables to my home theatre setup where I do not do critical listening.