JBL LSR6312SP SUBWOOFER The LSR6312SP powered subwoofer is based on a 12" woofer with JBL`s patented Neodymium Differential Drive NDD and 250 Watts of power. An integral bass-management system provides all the features you need for today`s multi-format surround production including: LCR and Direct LFE inputs, summed output for chaining multiple subwoofers, -4 dB alignment setting, and JBL`s new RMC Room Mode Correction system. RMC Calibration Kit included. For use with JBL LSR6300 series studio monitors. Features : * Multi-format powered subwoofer for Dolby Prologic, AC-3, DTS and other surround formats. * RMC Room Mode Correction provides electronic control of response peaks due to room modes. RMC Calibration Kit included. * 250 Watt continuous output power amplifier. * Sophisticated LCR bass management system. * Direct LFE input with selectable 10 dB input sensitivity. * Summed output allows chaining of multiple LSR6312SP for multiple subwoofer systems. * Neodymium Differential Drive NDD technology with dynamic braking for extended low frequency response and low power compression. * High-density baffle for low resonance and stable inertial ground. Linear Dynamics Aperture port design eliminates port turbulence and reduces port compression. * Reinforced enclosure and convenient mounting points for mounted installation.