But it's not just about the thickness of the silver coating - KLE Innovations has complex formulas for each plug that pertains to the construction of the pins and the thickness of the copper as well as the silver coating.
I have tried all models of the Harmony RCA and from my ow personal observations...
- The Copper Harmony is a good introduction, but
- Silver Harmony is my "GO TO" RCA for SPDIF (digital) cables - no need to buy more expensive Pure or Absolute models - they will offer no further improvements in sound for digital signals up to and including 24/192. I have not tried Silver harmony on higher resolutions.
- Pure Harmony - this is a puzzle to me, because in my mind, if you are going to purchase the Pure Harmony, you might as well spend a little extra and get the Absolute Harmony for the best possible performance
- Absolute Harmony - this is my "GO TO" RCA for all of my analogue cables. It has the best performance of the Harmony Line and well worth their price.
I hope that clarifies things
If you want to read my personal reviews of the Harmony RCA's...
http://image99.net/blog/files/category-klei-copper-harmony-rca.html
http://image99.net/blog/files/category-klei-silver-harmony-rca.html
http://image99.net/blog/files/category-klei-pure-harmony-rca.html
http://image99.net/blog/files/category-klei-absolute-harmony-rca.html
Regards - Steve