The sleek design of the S100 speaker, features industry leading Neo-driver, which is known to deliver a robust low frequency sound. Made of corrosion resistant aluminum, this high-performing true 100-watt speaker is designed to withstand the toughest conditions. The Dynamites slim and lightweight housing mounts easily into the grille, flush between the bumper and hose tray of large apparatus and to most vehicles bumpers. Product Features: Neo-driver for increased dependability. Quick, easy and cost efficient installations. 100-Watt high-output power. Corrosion-resistant aluminum housing with Black Finish. Sound output meets SAE J1849 and Class A. Slim and lightweight housing. Product Specifications: Dimensions: 5.9"W x 5.5"H x 2"D. Weight: 5.3 lbs. Impedance: 11 Ohms. Use this speaker with any 100 watt PA siren amplifier. This is a great speaker at an affordable price. Designed for 100 Watt PA sirens and emergency vehicles.