JBL long-excursion 10" woofer with high-flux motor for accurate, extended low frequency response below 28 Hz * 180 watt internal amplifer provides high SPL (Sound Pressure Level) for demanding production applications * Professional bass management system with selectable cross-over settings to optimize low frequency performance in a range of production environments * Balanced XLR, 1/4" and unbalanced RCA connectors with variable detented level attenuator allows interface to a broad range of signal sources * Extends low frequency of any speaker system for deep accurate bass in stereo and surround sound applications