Acrotec  is a interconnect made in Japan.  It uses pure copper 99.99997% 6N A2050 designation.  It uses 4pcs Star Line Tellurium Copper RCA Plugs connectors.  These cables are among the best sounding cables I have heard for their naturalness.  I have 2 other pairs I use.   They are 1 meter in length pair. These cables with their pure copper wire the cables are intricately braided (interwoven) with silver wires the entire length.   These cables have the purist copper I have ever seen used in cables of any kind.  I know having worked in the wire industry a long time ago that immersing copper in an through recirculating  Tin Baths is the method they use to clean the copper wires from impurities.  They must buy their copper wires a place that does this perhaps special just for their purity specs.