Model SM89 is a highly directional condenser shotgun microphone with distant pickup characteristics suitable for on-location film and television production. The SM89 can also be used for theater sound reinforcement, spot news coverage, or wildlife recording. The SM89 discriminates at a distance in favor of desired dialogue or effects and against ambient noiseeven in noisy surroundings. The on-axis frequency response of the SM89 is very smooth and extended. For clarity and speech intelligibility, a slight presence rise optimizes the high-frequency response to compensate for high-frequency losses. A low-frequency roll- off minimizes pickup of wind, mechanical vibration, ambient noise, and rumble without affecting voice frequencies. The off-axis response of the SM89 is virtually free of comb- filter effects. This is important when it is not possible to aim the microphone precisely or when it is desirable to pick up dialogue or sound from moving sources.