Power Cords


I currently have Wireworld Silver Electra power cords with upgraded Platinum plugs. I had two 1M Wireworld Platinum power cords, but rearranged my system and required longer cords. Yesterday I borrowed two Shunyata Sigma NR power cords. On the first note my wife softly said, "that sounds better". She said it was clearer. I listened for a couple hours, changing the power cords a couple of times. In my system and to my ears this is my conclusion:
The Sigma's are cleaner, definitely has more bass, a dead silent and completely black background. The Wireworld cords are more detailed, with a wider soundstage and better spacing/separation of instruments. All things considered I'll keep my Wireworld, but I'm curious to listen to other power cords.
After inserting the Sigma's I just don't understand how anyone that listened to different power cords could conclude that they can't hear a difference. There is a difference, but like any other component the individual has to decide if the change is worth it. $6K for two power cords is relatively expensive. Expensive, but oddly maybe a good value? In my system there was a definite improvement with better bass impact and articulation. Would spending $6K or just changing amplifiers yield similar results? As with most components there are trade-offs...is there a power cord out there that has the benefits of the Sigma's and Wireworld Silver Electra's? If so, at what cost?  
ricred1
Audioquest asked me not to write all the details over the Hurricane yet. I have to respect that. I am now busy in writting the review of the Hurricane. They want to check this first before I post it.

And it will be very detailed so all people will understand what it does and why it is so different to other powercables  and the older Audioquest powercables.

You only can get a realistic review when you can reveal all the information of the recording. What I said before the facts proof that most audio products and brands are incomplete.

Many systems which are used in reviews are incomplete on facts. These people cannot think in properties, so they write a review based on trial and error. This will never give any realistic information over the product which is being reviewed.

So you need to change they way you think about audio. Trail and error proofs that it is one big gambling. That is why a new mindset is needed to bring people to a much higher level in sound and realism than they own now.

What I said; the facts proof that most sold audiosystms are 2D. Most audiosystems proof that there is almost no diversity. Most audiosystems create a lot of acoustic limitations in a room.

All these limitations togheter are the main reason why many people are changing parts in their system all the time.

Because they don't realize that they cannot control and understand what they change. This is why many are in a circle and can't get out.

You only can break this circle when you understand why the stage and sound of your system is what you hear. 
Huh? They asked you not to write the details of the Hurricane power cord? That’s pretty funny since the details are provided on the Audioquest web page for the Hurricane. Don’t believe me?

http://www.audioquest.com/power-cables/hurricane-high-current