ZVOX SoundBase 670 36&rdquo;Sound Bar with 3 Built-In Subwoofers, Bluetooth, AccuVoice Left, right and center speakers for super-clear voice reproduction and accu voice feature uses hearing aid technology for super-clear dialog reproduction Beautiful full-range sound from a single cabinet, no separate floor standing subwoofer needed;Bi-amplified design uses electronic contouring for accurate frequency response Each Sound Base can learn to respond to your preferred remote control;Frequency range: 38 Hz - 20 kHz. Designed to support a TV placed directly on top of the Sound Base, if desired. Optical and coaxial digital audio and analog audio inputs Dimensions: 36 "W x 16 1/2"D x 3 1/2 "H