Behringer B1800X Pro Eurolive passive subwoofer speakers make the ideal addition to any PA system for reinforcing low frequency performance. Behringer B1800X Pro Eurolive bass bins come designed to deliver 1,600 Watts of bottom-end grunt from its long-excursion 18" bass driver. Tuned for the 40-300 Hz frequency range and loaded with an inbuilt switchable crossover for optional passive or bi-amping, B1800X Pro Eurolive subwoofer speakers perform under the most of demanding suituations.