The Electro-Voice EVID C4.2 is a compact, low-profile 4" coaxial installation speaker, offering a smooth, extended frequency response appropriate for both background music and paging applications in offices, waiting rooms, and retail spaces. The EVID C4.2 is equipped with a line-matching transformer for 70V/100V operation, and a transformer tap selector switch that includes 8 Ohm bypass operation, conveniently located on the front of the speaker. The enclosure is both ported and tuned, optimizing bass response, and the unit is supplied with a well-designed 3-point mounting system for simplified installation.