Stressfree 99.99999% Ultra pure copper 7N DUCC Dia Ultra Crystallized Copper, EEF 2 cores for indoor wiring.		Japan Made. Highest manufacturing standard Contents .. Unterminated 6N-P4030 Power Cable No retail packaging. Cut by the meter from a reel. Quantity of 1 means 1 m, 2 means 2m, etc .. Supplied by Authorized Distributors in Japan.
Advanced refining process still leaves the great variations in composition of impurities and crystalline structure according to employed method. All 7N copper materials are different, and in reality, most of so colled 7N materials are not measured comprehensively. As shown in disclosed analysis table, ACROLINK is the sole producer of stabilized ultra pure copper. It is essential to maintain high purity to achieve extended frequency response because impurities inhibits capability due to impedance variance. A unique stress-free process is applied after formation of actual cable core structure for maximum effect, in special environment maintaining original purity to restore crystalline disorder caused by extrusion process. Insulation material; High performance Ecological Polyethylene has excellent sound quality and low dielectric constant factor. New polymer polyolefin, presently the best material available, has been chosen as insulator for extremely low dielectric constant factor which is 1/3 of polypropylene and 1/4 of PVC. Resonance absorption; is one of big factors to decide final sound quality. ACROLINK always paid extra attention and built up tremendous know-how. Every product is carefully composed with selected materials in order to achieve perfectly balanced and effective absorption. Conductors Stressfree 7N DUCC Extra thick copper ø2.6 x 2 wires Resistance 3 mΩ/m Insulation Polymer Polyolefin Capacitance 25 pF/m Max Current 50 Length 1~30m, unterminated, sold by the meter (cut from a reel, not returnable) Weight 150g per meter   Impurities Analysis Fe Ni Si Al 0.03 0.003 0.05 0.005 S Ag Na K 0.05 0.05 0.004 <0.005 U Th H O <0.0002 <0.0003 <0.03 <1.0 ppm/GD-MS Gas Analysis