We use Copper Clad Aluminum Magnesium (CCAM). We use elastic PVC for a soft touch, and the two strands round + square are very easy to route and have low memory. You can use this speaker wire to pair with banana plugs, spade tips, or bent pin connectors to connect your speakers to your A/V receiver or amplifier. Designed to provide adequate performance for any home theater system, club, restaurants, hotels, meeting rooms, car audio speakers or professional studios, also perfect for boats, vehicles, open cinema and outdoor setups