Russound 5B45B 4" Indoor Outdoor Speakers Black Tuned For Improved Off-Axis Listening And Equipped With Pivoting Tweeters Featuring Advanced Design And Materials Such As Polypropylene, Kevlar, Aluminum And Silk, 5B45 2-Way 4" Impp Cone 25Mm Teteron 80Hz-20Khz Redefines Affordable Performance In Architectural Loudspeakers Featuring Advanced Design And Materials Such As Polyprpylene, Kevlar, Aluminum, And Silk Redefines affordable performance in architectural loudspeakers Featuring advanced design and materials such as polyprpylene, Kevlar, aluminum, and silk Engineered to deliver accurate sound with quality and value when used in-wall, in-ceiling, or outdoors Acclaim 5-speakers provide an excellent alternative to more expensive speakers without compromise to aesthetics or efficiency