JBL SUB140P/140 140 Watt powered subwoofer incorporates an 8" (200mm) down-firing cone transducer and a built-in high-performance 140 Watt amplifier that deliver the powerful, dynamic and accurate low-frequency performance that makes your film soundtracks and music come alive. And with line-level and LFE inputs, adjustable crossover and phase controls and automatic turn on/off, the SUB140P is also simple to connect and set up.