Copper Sleeve over IEC

I tried this today. I had absolutely no expectations. First I put a copper sleeve on the power cord of my Linn Ikemi CDP. I did hear a difference. Highs and background sounds in the upper treble were more pronounced, but not for the better. Too tipped up, too pronounced, not exactly etched but just too much treble. I had the same experience on the Cary slp98 Preamp power supply. On my Wyred 4 Sound amp the treble was virtually the same as with the other components with the mid bass also very pronounced. Not boomy at all, extremely taught and firm, but over bearing. So for me, in my system, the copper changes the sound wherever I put it but always to the detriment of the listening experience.

My system is very balanced, neutral and extended. I can see if you are lacking some resolution, and detail that this could be a great tweak.

Just continues to prove how different every system is, and how much everything matters.

Great thread!

Leatherneck1812, Upper treble glare should not be one of the changes with the copper sleeve.
Just put the copper sleeve over the IEC end only on the CD player, thats where you will notice the most improvment.

Ozzy,

I bought 2 and have had them by themselves or as a pair on every IEC plug. In my system it puts the treble over the top. Even just on the CDP which is where I started. FWIW I also tried heavy duty aluminium foil and it did the same thing. A change but not an improvement in my system.
Russ

I put a 1" copper tube on the IEC of my ARC CD3MKII. I got it at Lowes for $1.88. I didn't hear any difference. I suppose I could get my money back. I won't tell them what I used it for.

When I was a kid, people would put tin foil on their rabbit ears (TV antenna) for better reception. That didn't seem to help much either.

Tonywinsc, Its hard to believe that a 1 " coupler fit over your power cord. You must be using an el cheapo cord.
So, you are out $1.88 for trying,,,
Better to put your money into a quality power cord.