I'm using SR master couplers and Transport and DAC, very happy with results - I have the 200 and 566.
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Lak - I too hear important differences with power cords, but accept that others might not - I am open to the possibility that Brutus may be speaking from experience, in which case I would be further interested in his or her system context. But you are right that there are many with opinions like the one expressed by Brutus which are simply the product of having a tiny brain.
Brutus, I have tried a few inexpensive power cords ($100-$260) and the difference can be insignificant and/or hard to distinguish. When I tried others (which happened to be more expensive) I noticed significant differences. If you don't,(as Redkiwi asked) what does your system consist of and what music do you use for reference? This could prove to be beneficial information to many of us!
I have a friend that owns a local wire plant. As a result I can get just about any cable configuration made up for me (as long as I don't do it too often). But I enlisted him in an experiment to find an ideal power cable. We tried a lot of things and found that if we changed anything about the design or materials, we could hear the effect. I must admit the quest was very confusing and perhaps a better knowledge of the scientific issues may have helped us. It took a long time before we understood how to make a good power cable. At the end of it I had a lot more respect for audio cable companies, and a lot less tolerance for those that complain about the difference between the retail price of an audio cable and the apparent worth of the ingredients. The costs must be significant in design and experimentation, not to mention marketing in a very crowded market. But I guess my real point is I could hear the difference between cords that had only subtle differences in their design, so I find it very difficult to understand how others cannot. On the other hand I put a lot of time into helping others set up their systems and I have got to say some audiophiles live with some terrible sounding systems through lack of knowing about setup and room treatment - in such systems I can imagine why cables do not sound different.