Electro-Voice EVID FM 4.2 4-Inch Install Speakers (Pair)A complete in wall speaker package, the Electro Voice EVID FM 4. 2 has a 4" low frequency cone, titanium coated dome tweeter, and uses a crossover network. The EVID FM4. 2 flush mounted loudspeaker system from Electro Voice is a complete in wall loudspeaker package, consisting of a bezel assembly, grille, rear enclosure, two way loudspeaker, and an internal line matching transformer. The loudspeaker features a 4 low frequency cone and high temperature