Brand new silver power cord is bright sounding

I think, it depends on the position from the moon
---> sometimes my silver Power cords give me sonically a touch of orange
earthing, mixed with some purple colored sound staging and a dark
background.
Sometimes I also have a touch of green details with superior blue top End,
linked with a invisible airy medium Frequency area.
I think, the Furutech connectors add that kind of sensitive darkness which helps
me to enjoy the music without wearing sunglasses.
Highly recommended.

Robertsong,
Is this a pure silver cable or is it silver'plated' over copper? Either way you may just need more hours of use.I find the good silver cables to be open,transparent and provide natural tonality.Silver is not inherently 'bright'but it is honest IMO.There are copper cables that can sound bright also, depends on which particular cable and in what system.

Silver is quick and known for helping to deliver as much detail as possible. Your experience is not unique. Silver often leads to a sharpening of the sound. However as was said the better conductance of the silver may be exposing some other weakness in you system. Silver does burn in like all cables and will mellow but only very slightly. It may not be a good match for you. I use Silver on sources both PCs and ICs and then use really good copper down the chain to balance the character of the two metals, works great.

i have several silver plated copper powe cords. none are bright. none were bright prior to break in. there are other factors besides wire which determine performance.

as has been suggested, how did your system sound priot to uding this cable.

if you have a bright amp/pre or speakers, try other cords and see if the brightness remains.

Are you using any power conditioning in front of the power cord?

I would address that if needed first from a clean power perspective by trying a power conditioner perhaps for everything except the power amp at first and then see how everything else does from there. IF the power conditioner is beefy enough to deliver enough current to the power amp, then yu might try it with the power amp perhaps as well as an option.