The C3900 Series speaker offers industry leading technology in a low-profile design. With a 40% decrease in depth compared to leading competitors, the C3900 allows the user to mount in multiple vehicle locations without compromising dB levels. This speaker offers uncompromised durability coupled with the highest sound pressure on the market when paired with any Code 3 siren. The C3900 is designed to fit easily behind the grille of under cover police vehicles.