Copper conductors are mostly used with purity expressed as a number of 'nines'. So 'six nines' or '6N' purity might be 99.99997 per cent pure copper. Good speaker cables can have many strands (multistrand) or one or more thick wires (solid core). Look for arrows, which should point from the amp to the speaker, on directional cables. Directional interconnects have arrows that point from source to amp.
Speaker cables can be ‘solid core' or ‘multistrand'. Some cables are directional which maybe indicated on the outer sheath. Good cables or copper may be described as LC-OFC (linear crystal, oxygen-free copper)
1/4 inch: Unbalanced cable most often used for instruments and patch cords. TRS (Tip-Ring-Sleeve): Balanced cable that has 3 different contacts on its 1/4 inch connectors (headphone jacks are an example) XLR: Balanced cable used for low impedance