Definitive Technology Dymension DM80 Bipolar floor-standing speaker with built-in 12" powered subwoofer

Product highlights: tower speaker with built-in 12" powered subwoofer cloth grille-wrapped enclosure adjustable speaker feet include spikes and pads for a range of flooring surfaces Dolby Atmos® and DTS:X™ ready with optional Definitive Technology DM90 add-on height module (sold separately) Bipolar driver array: fully balanced design — two identical sets of drivers for the front and rear: 1" aluminum oxide dome tweeter with Teteron (cloth) suspension for smooth, extended highs dual 5-1/4" BDSS mid/bass drivers Balanced Dual Surround System (BDSS) driver technology places rubber surrounds on both the outer and inner edges of each speaker cone for improved control and clarity Linear Response Waveguide reduces the woofer's back wave for smoother midrange response Built-in powered subwoofer: one 12" active woofer two 12" passive radiators increases the sound-radiating surface area for enhanced bass output patented Intelligent Bass Control provides precise bass level adjustments while maintaining accurate midrange tonal balance 400-watt built-in GaN FET amplifier offers high efficiency and better control over the woofer Specs: frequency response: 28-23,000 Hz (-3dB) recommended amplifier power: 50-300 watts sensitivity: 90 dB impedance: 4 ohms Connections: 5-way binding post connectors for main input additional posts with jumpers let you set rear-firing bipolar drivers to "balanced" or "forward-focused" sound profile rear input lets you use a second amplifier for continuously variable rear level separate binding post inputs for optional DM90 height modules (not included) Other info: dimensions (measured by Crutchfield): 11-5/16"W x 49-7/16"H x 17-5/16"D 83.1 lbs. warranty: 5 years speakers, 3 years electronics MFR # 300570-01-00-101