Here are two Electro Voice 664A Dynamic Microphones from the 1970’s (2 Available at $125 Each)! 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! These have been serviced with cleaned diaphragms and new foam. Both have an engraving near the bottom. Grab one of these lesser known 664A Dynamic Microphones from Electro Voice!