Definitive Technology Dymension DM40 Bipolar floor-standing speaker

Product highlights: 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 4-1/2" mid/bass drivers back-panel switch lets you set rear-firing drivers for "balanced" or "forward-focused" sound profile Specs: frequency response: 55-23,000 Hz (-3dB) recommended amplifier power: 50-250 watts sensitivity: 87 dB impedance: 4 ohms Other info: cloth grille-wrapped enclosure adjustable speaker feet include spikes and pads for a range of flooring surfaces 5-way binding post connectors dimensions (measured by Crutchfield): 10-5/16"W x 37-7/16"H x 10-1/16"D 38.1 lbs. warranty: 5 years MFR # 300567-01-00-005