JBL LSR2310SP Powered Studio Subwoofer 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