The Polk Monitor XT12 subwoofer is outfitted with a 12” Dynamic Balanced Woofer and 100W peak Class A/B amplification that deliver loud low effortless bass so you can enjoy movies music and gaming with more impact amazing speed and control even at 24Hz. Equipped with convenient built-in controls for volume variable crossover (80-160Hz) and phase polarity (0/180) control. The sub is housed within a rigid low-resonance cabinet to provide clean loud bass. Easily integrated into any home theater or music listening environment and featuring new woofer amplifier and cabinet designs—the MXT12 fulfills the Polk promise of great sound for all. Add another same-model subwoofer to your home audio set up to dramatically improve realism smooth out peaks and dips as well as to get an even bass response for all your movies and music.