The Yamaha surround self speakers are a 2.0 channel PA speaker system designed for Yamaha brand compatibility. These black plastic speakers feature a rear firing port and wired connectivity with an impedance of 6 Ohms. With a driver size of 1 inch. these speakers offer a sleek and powerful audio experience ideal for musical instruments and gear enthusiasts. The unit quantity of 3 ensures a full surround sound setup for an immersive listening experience.