Electro-Voice 660A is a super-cardioid dynamic microphone that provides reliable service in many situations that directional microphones are required. It utilizes the Electro-Voice patented Variable-D® principle, which means it will accurately respond in situations that demand the talker, singer or instrument be close to the microphone.

The 660A has a wide-range response uniform from 90 to 13,000 Hz and is essentially “flat” from 150 to 10,000 Hz, with an 8 dB rise in response from 50 to 150 Hz. It has a maximum diameter of 38.1 mm (1.50 inches) — with tapered shank — and a maximum length of 165.1 mm (6.50 inches), not including cable connector. The case is made of pressure cast zinc and has a non-reflecting gray finish.