The Behringer EUROLIVE B1520 PRO is a high-performance speaker system equipped with great features with a 15" woofer. The result is better performance in the low frequency range, eliminating the need for additional subwoofers in many applications. For large PA setups the B1520 may be used in bi-amping mode adding a B1800X subwoofer for low frequency transmission. You get a PA system that grows with your needs without making any compromises. Its trapezoidal cabinet design is perfect for cluster formation in larger PA systems. Integrated HF driver protection and professional connectors compatible with Neutrik Speakon complement this professional package.