The Electro-Voice Model 631 omnidirectional dynamic microphone
Description and Applications The Electro-Voice Model 631 is a dynamic omnidirectional microphone designed to yield outstanding performance in demanding public address and semi-professional recording applications. Created particularly for close working, hand held situations, it is equally effective for musical pickup on table or floor stand. A unique new concept utilizes a sealed magnetic “on-off” switch inside the microphone case. A magnetic actuator outside the case is easily removable without tools—leaving the microphone connected for the “on” mode of operation.
The 631 features the exclusive non-metallic Electro-Voice Acoustalloy® diaphragm which permits very smooth response over a wide frequency range, and withstands extremes of humidity and temperature and corrosive effects of salt air, making it nearly indestructible with normal use. The microphone utilizes the mechanical nesting principle by means of which internal parts are nested, one within another, resulting in an assembly that is nearly indestructible.
A specially designed internal shock absorber dramatically reduces pickup of cable noise and other mechanical noise generated by external contact. The integral four-stage pop and dust filter ensures unusual freedom from noise generated by the movement of air over the microphone surfaces.
