The impedance (Z) is a measure of opposition that a circuit to a current when a voltage is applied. The impedance extends the concept of resistance circuits alternating current (AC), and has both magnitude and phase, unlike resistance, which has only magnitude. When a circuit is powered with direct current (DC), there is no distinction between the impedance and resistance; the latter can be thought csa impedance with zero phase angle.

The OFC cables (Oxygen Free Conductivity) are known as oxygen free cables. Such cables maintain a high thermal conductivity, electric and very low level of oxygen, which prevents deterioration welds.

Audio, they provide less signal degradation, which is used for high-end equipment to get a professional sound connecting speakers with sound equipment.