Key Features: Multi-format powered subwooferfor Dolby Prologic, AC-3, DTS andother surround formats. RMC™ Room Mode Correction provides electronic control of responsepeaks due to room modes. RMCcalibration kit included. 260 watt continuous output poweramplifier. Sophisticated LCR bass management system. Direct LFE input with selectable+10 dB input gain. Summed output allows chaining ofmultiple LSR6312SP for multiplesubwoofer systems. Differential Drive® technology withdynamic braking for extended lowfrequency response and low powercompression. High density baffle for low resonance and stable inertial ground. Linear Dynamics Aperture portdesign minimizes port turbulenceand reduces power compression. Reinforced enclosure withstandardized mounting pointsallow mounted installation.
I bought this from Cutting Edge Audio in San Francisco back in 2007., but I'm not the original owner. It's certainly used (see pictures), but it's got it where it counts.