Here's an Electro Voice 664A Dynamic Microphone from the 1970’s! While the 664A shares the same number as its predecessor (the 664), the 664A is a completely different microphone. These microphones have the signature “Variable-D Principle” with little to no proximity effect. Overall, the design of the capsule is very similar to the RE10/15 microphones. While the 664A doesn’t have the same overall design, they have a similar sound overall for a bargain of a price. If you’ve been looking for a versatile dynamic microphone, this is the microphone for you! This one has been serviced with a cleaned diaphragm and new foam. Grab this lesser known 664A Dynamic Microphone from Electro Voice!