Harman International Industries JBL Professional 4642A Woofer - 2400 W RMS - 40 Hz to 500 Hz - 4 Ohm 4642A

4642A Dual 460 mm (18 in.) Subwoofer System The JBL Model 4642A is a high quality subwoofer system, featuring an advanced technology 460 mm (18 in), low frequency transducers mounted in a direct radiator, bass-reflex enclosure for smooth response to the lowest audible frequencies. The 4642A is ideal for low-frequency augmentation of either analog or digital soundtracks in motion picture theaters and for general sound reinforcement applications.