Rebbi, regarding power cords you'll most likely find
this post by Atmasphere (Ralph K.) to be of interest, and perhaps the rest of the thread as well.
I would add that the factors he cites as being most important in a power cord, namely minimal voltage drop and adequate bandwidth, while probably compromised to an audible degree by the cord you are presently using, are readily obtainable for far less than the megabucks some audiophiles invest in power cords. In that regard see Ralph's post
here, and also my response in the second post after that one.
I would also add that the consequences of voltage drops and bandwidth constraints that may be imposed by a particular cord figure to be highly dependent on the design of the particular amplifier, including its class of operation (i.e., class A, AB, or D) among many other factors. And the effects of voltage drops figure to be highly dependent on the happenstance of the line voltage at the particular location.
One thing I would definitely avoid doing is extrapolating any expectations about the performance that is likely to result with a specific power cord from experiences that may be reported with class AB or class D amps, which differ greatly from SETs and other class A amps in terms of how their AC current draw fluctuates with the dynamics of the music.
I'll also say that there is often what I perceive to be an incorrect tendency among many audiophiles (and I am NOT referring to any of those who have posted above, whose opinions I greatly respect) to conflate the musical resolution of a component or system with the ability of the component or system to resolve differences in hardware, such as power cords. Obviously there is a relation between the two, to some degree, but from a technical standpoint I see no reason to exclude the possibility that depending on its particular design a component providing a higher degree of musical resolution might be less sensitive to differences between power cords and other cables than one that is not as musically resolving.
The bottom line to my thoughts on the subject, FWIW: Consider
Signal Cable.
On another note, I'll add my congratulations to the many that have been expressed regarding the great results you have already achieved with this project. And kudos once again for the beautifully done blog.
Best regards,
-- Al
