The Alto TrueSonic 3 TS212S is an active subwoofer with a 12" driver giving you fantastic low-end output and punch.
 
12" Driver with High-Temperature, Long-Throw Voice Coil
1000W Continuous, 2000W Peak Class D Power Amplifier
XLR Outputs with Six Discreet Output Modes for Matching with Companion Speaker
Extended LF Switch for Increased EQ Control
Electronic Clip, Thermal and Transducer Overdrive Protection
Integrated 35mm Pole Socket