The Basic signal line uses high-purity oxygen free copper as the conductor and is twisted into multiple strands in a spiral manner. Taking into account aspects such as dielectric, shock absorption, and shielding, low dielectric value foam PE is ultimately selected as the insulation, and graphene aluminum foil is wrapped around the outer layer of the foam PE insulation. The finished Basic signal cable is handmade, with a full and natural sound that is durable and has a high cost-effectiveness.