There are 3 kinds of CCA with different copper percentage copper percentage from hh to low is CCAM CCA UCCA we use CCAM for this speaker wire.You can use this speaker wire connect your speaker home hifi KTV stage and related system.The cable can insuring hh fidelity sound quality and providing good conductivity and durability without paying the additional cost. The product go through many states of testing to ensure very good performance and reliability of the products.This is soft touching cable with elastic PVC and very easy routing by round + square strandsCCAM wire offers similiar snal frequency and reliability in terms of corrosion resistance to copper wire.