JBL 4642A Subwoofer home-audio there's also a pair of

there's also a pair of RCA jacks on the back that are fed by a second set of channels

The NS-ICS600 6-inch in-ceiling speaker handles outputs stereo from one speaker

battery clip set

1/8" CD/MP3 input

external power supply

JBL 4642A Subwoofer home-audio there's also a pair ofThe 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. FEATURES 1200 Watts Continuous Pink Noise, 2400