Behringer EUROLIVE B1800HP PA SubwooferThe Behringer EUROLIVE B1800HP Active 2200-Watt PA Subwoofer with 18″ Tubosound Speaker provides your PA system with low frequency sound reinforcement by leveraging a 18.0″ (45.7 cm) long-excursion TURBOSOUND woofer with 2200W of Class-D amplification to deliver a frequency response of 40 to 150 Hz (±3 dB).For I/O, the subwoofer features balanced XLR inputs and outputs, as well as balanced XLR Thru jacks for connecting to additional speakers and building more powerful and complex systems. A boost frequency knob targets a boost frequency between 40 and 90 Hz and gives the target frequency a +10 dB boost. The unit also has a high cut dial that provides precise control over the upper corner frequency of the subwoofer’s amplifier, without affecting the Thru signals. A level knob controls the input gain and a phase switch allows you to reverse the output phase to compensate for frequency cancellations between the subwoofer and satellite speakers.The subwoofer includes ergonomic handles for easy transport as well as a pole socket for mounting with commercial spacer poles. A rugged steel grill protects the speaker cone and an internal intelligent limiter ensures maximum sound performance and woofer protection. The unit was conceived and designed in Germany.Behringer EUROLIVE B1800HP Features: