Professional XLR Cables Io Audio Technologies Professional XLR Cables are designed using two stranded, 24AWG OFC conductors in a tight-pitch, twisted-pair configuration. The utilization of PE insulation reduces the capacitance, while a spiral copper shield offers excellent EMI and noise rejection. Between the conductors and shield is a conductive yarn that is designed to increase the flexibility of the cable. Io Audio Technologies Professional XLR Cables have a sturdy PVC jacket designed to take abuse in any environment.