The Venue Series SUB12 performs like a pro, with technology developed by JBL’s Professional division. Equipped with JBL''s tried-and-true PolyPlas woofer, this Subwoofer delivers the low-frequency goods. Special effects in your favorite movies, assisted by the FreeFlow flared port, are loud and clear, without unwanted Distortion or boominess. A powerful amplifier backs up the 12-inch woofer with high-output. LFE- and line-level inputs provide maximum connection flexibility. Convenient level and crossover-frequency controls and a phase Switch let you tailor the SUB12''s performance to your room''s acoustics or your taste. The Peak Dynamic Power is measured by Recording the highest center-to-peak voltage measured across the output of a resistive load equal to minimum impedance of the transducer, using a 50Hz sine wave burst, 3 cycles on, 17 cycles off. The SUB12 powered subwoofer is just the ticket to bring your Home Theater system to life.