NXG Technology NX-PRO830i 8" 150-Watt 3-Way In-Ceiling Speakers With Pivoting Tweeters (pair) Minimum diffraction pivoting 1" fluid cooled, high tenacity teteron dome tweeter; 2 1/2" metallic anodized polycarbonate cone midrange Metallic anodized graphite filled injection molded RCT cone woofer with rubber surround; Optimized 12dB electro-acoustic crossover utilizing Mylar capacitors, air core inductors and gold input terminals Baffle mounted micro switches allow speakers to be adjusted to better match room acoustics; Reduced resonance, minimum diffraction, polycarbonate baffle Dog leg type mounting system; Perforated woofer basket helps shield driver from insulation and debris; Foam grille backing hides speaker components from view Foam grille backing hides speaker components from view; Corrosion resistant powder coated aluminum grille and may be painted to match any decor