The EV630 is a solid, but elegant, workhorse microphone from the golden age of ‘reliable and made to last’! It was a versatile and popular product, remaining in the Electro-Voice catalogue for more than 25 years. Even now it has a certain vogue among radio hams, who value its vocal clarity, and blues harmonica players seeking out that elusive, fat, ‘Chicago’ sound!
This 1960s EV630 Tech Spec shows an impressively flat response from 60hz to around 10khz, which is due in part to its small size and rounded shape.
The earliest reference I have found to the EV630 is in a Lafayette Radio Catalog 1942