This specification indicates that the cable consists of two conductors, each with a cross-sectional area of 1.5 square millimeters.

The “100M” likely refers to the length of the cable, indicating that it’s 100 meters long.

Speaker cables are commonly used to connect audio amplifiers to loudspeakers. The cross-sectional area and length of the cable can affect its resistance, capacitance, and inductance, which can impact the quality of the audio signal transmitted.