Professional OFC RCA Male Signal Cable 7.5mm Gold Plated Dual Shielding for Amplifier CD Decoder

A signal cable transmits analog or digital audio signals between components such as microphones, mixers, amplifiers, speakers, and playback devices. Its primary function is to carry the electrical waveform from a source to a receiver with minimal loss or interference, ensuring accurate sound reproduction.

OFC stands for Oxygen-Free Copper. It is a high-purity copper with very low oxygen content, which improves electrical conductivity and reduces signal resistance. Compared to standard copper or CCA, OFC provides clearer audio transmission, less distortion, and better long-term durability against corrosion.

PVC is widely used because it offers good flexibility, durability, and electrical insulation at a cost-effective price. It protects the internal conductor and shielding from physical damage, moisture, and chemicals. High-elastic PVC, in particular, provides extra flexibility for tight routing and repeated bending without cracking.

Shielding, typically a braided or foil layer, wraps around the inner conductor to block electromagnetic interference and radio frequency interference from external sources like power cables, motors, or wireless devices. Without proper shielding, unwanted noise or hum can be picked up, degrading audio quality, especially over longer cable runs.

Balanced cables have three internal conductors: two signal wires plus a ground, and they use a differential signal to cancel out noise picked up along the cable. Unbalanced cables have only two: one signal wire and one ground. Balanced cables are superior for long runs and professional applications, while unbalanced cables are common in consumer gear.