Model PD-60A is a fully environment-resistant 60 watt driver for indoor or outdoor application recommended for use in expansive and/or high ambient sound-level areas. Unit features magnetic-structure components machined to optimum tolerances, 2" voice coil and a plane wave frequency response of 100 - 3,700 Hz (+5dB). Model PD-60A provides screw-type terminals for matching direct to the 16 ohm voice coil impedance. Corrosion-resistant terminal connections are protected by a transparent, impact-resistant plastic cover which provides strain relief for the interconnecting cable. The PD-60A is terminated in standard 1 3/8"-"18" thread male couplings for use with screw-on horns.