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Since its introduction in 1931, the Western Electric moving coil micro*phone has solved many of the difficulties encountered in broad*cast*ing, sound recording, and public address service. While this micro*phone was a decided advance over apparatus existing at the time of its introduction, extensive field experience during the past four or five years and continued development studies have now made possible the production of a distinctly better instrument. While retaining all the good features of the previous, or 618A, type the new micro*phone has the added advantages of a more uniform frequency characteristic from 40 to 10,000 cycles, a considerably wider range than the 618A, and is essentially non-directional in its response. At the same time the micro*phone is smaller and lighter than the old, and thus of increased portability and convenience. It differs radically from previous micro*phones in appearance, consisting of a two and one-half-inch spherical housing and a two and one-half-inch acoustic screen held a fraction of an inch off the surface. This micro*phone is known as the 630A.


Is the EV 635 a "forgotten" vocal sleeper microphone?

Bob have you any experience using the 630a on a snare?

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Replacement Cartridge / Element for an Altec 633A

Yeah, I noticed the mount for the 630A looks like basically the same double ring with different attachment points, and it hadn't registered there were single and double plate versions.

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