THX SL200-PSM: THX Certified 200 Watt Powered Bass Module - 12 magnetically shielded woofer is driven by a powerful 200 Watt amplifier for clean, tight bass. 24k gold contact conductive plates let you drive a Monitor and a Bass Module with a single set of cables. Curvilinear enclosure cancels standing waves for clear imaging and a deeper, more precise soundstage. THX Select certification delivers movie theater quality sound in the comfort of your own home. Dimensions: 14.2 L X 13.2 W X 29 H Weight: 53 lbs.Get Deep, Powerful Bass Without Sacricing Style Bass Modules bring your home theater to life.Bass adds excitement to home theater sound. Whether it's the roar of rocket engines or the rumble of a kettle drum,you need deep, powerful bass to get the full impact of today's demanding movie passages, musical scores and gaming effects. Working within Monster's innovative line of high-performance THX Select Certied home theater speakers, Monster Tower Bass Modules operate as left and right, front and rear low-frequency channels to deliver intense, 5.1 surround sound audio while complementing your existing dcor. Advanced technology adds depth and realism to your favorite movies,music and games.High-powered for fast-dynamic, transient bass, Monster Tower Bass Modules bring movies, music and surround sound gaming to life. Functional as a stand- alone bass unit or a full-range speaker when congured with Monster Monitors, they masterfully reproduce low-frequency effects with sonic accuracy. Monster spent countless hours of critical listening to ensure designs met stringent Monster standards for audio quality and could surpass requirements for THX Select certication. A 12woofer and 200 Watt RMS amplier deliver deep, tight bass with exciting, incredibly realistic sound. Traditional styling creates an inviting atmosphere for family and friends.Say goodbye to the black box. Monster Tower Bass Modules look as stunning as they sound. Streamlined, stackable designs feature curved lines, black accents and a high-gloss deep cherry or piano black nish to complement your dcor. Designed to coordinate beautifully with Monster THX Select Certied Towers, Monitors, Dipoles and Subwoofers, as well as MDesign Cinerama Component Centers,they create a stylish, integrated home theater ensemble your family will love. Powerful performance. Timeless style.Monster THX Select Certied Speakers.