This is the Bi-Amp version with 4 amp to 4 speaker connectors. The design is a 4 x 1.6 mm2 square shaped lead configuration, where each lead comprises a plastic core around which 12 strands 5N oxygen-free copper are spun in a tight pitch. This minimizes skin-effect and inductance efficiently and by choosing the sonically benign PP as di-electric (insulation) the sonical stability by preventing corrosion and material fatigue, will remain at highest possible level year after year. The specification and performance fits right in between our Supra Quadrax and Sword edition. Banana & spade plugs included!