ETS SM1-U Unidirectional Microphone is completely redesigned in 2005 for higher performance. Unidirectional pre-amplified microphone for use where
back- ground noise must be reduced. Simply mount the SM1-U in the direction of interest.

• Reduced (-20db) sensitivity on all sides.
• Unique dual electret pickup and differential amplifier results in astonishing ambient (background) noise rejection. 
• Low noise MOSFET pre- amplifiers. 
• Similar in appearance to a fire suppression sprinkler head. 
• Adjustable gain. 
• Line level unbalanced output. 
• Limiter and TB circuits selectable on/off. 
• Easy cable run termination. 
• Power: 12VDC @ 10mA. 
• On-board voltage regulator 
• Optional surface mount adapter, SM1-S