Definitive Technology Demand Series D15 Left Channel 3-Way high-performance tower speakers deliver full-range, room-filling sound, and precise imaging with deeper, punchier bass in a modern, elegant design. Featuring a two 5.25" carbon fiber drivers, two 8" side-firing passive radiators, a 1” annealed aluminum dome tweeter with 20/20 Wave Alignment Lens, and a 5.25" (BDSS) midrange/woofer, the speaker delivers an unrivaled sweet spot, smoother high-frequency reproduction, and three-dimensional imaging for the most technically advanced audio experience. Comes in a clean, modern industrial design with a bead blasted finish provides a timeless look and feel that fits any décor. Can be used as a standalone speaker or can be paired with the D15 right-channel tower speaker for a precise 3D sound system. Build a sophisticated home theater system by pairing with D5 center channel speaker, and D7 or D9 bookshelf speakers for lifelike, 3D surround sound that is audible from anywhere in the room.