Optimus Omnidirectional Boundary Microphone
(330-3022)                 Preparation                Faxback Doc. # 56002

Choosing a Location

The microphone uses a "hemispherical" pick-up pattern, which means it 
picks up sound equally from all directions within the space (hemisphere) 
above and around the microphone.  Sound quality remains consistent no 
matter where it originates.  It does not vary from side to side, or from 
top to side.

Note:  The microphone might pick up some sound from the area behind its
       base (below the plane of the mounting surface).  However, the sound
       quality is not as good as the sound picked up from above and to its
       sides.

Experiment and listen to find the best location for the microphone.  
Choose what you think is the best location, then listen to how it sounds.

To achieve the best performance, improve low frequency sound pick-up, and 
maximize the microphone's range:

  Place the microphone on a solid, flat surface, with the top of the
  microphone in the found source's "line of sight" (so the person speaking
  can see it).

  Leave at least 1 foot (0.3 meter) of clear space all around the
  microphone.

  If you use two or more microphones, position them at least 20 feet (6
  meters) apart.

  Avoid positioning the microphone on carpeting or other sound-absorbent
  material.

Note:  If you must position the microphone on a carpeted surface, place a
       4 foot (1.2 meters) square piece of plastic or wood on the carpet
       first, then place the microphone on top of the plastic or wood.

Connection

Be sure the microphone's ON/STBY/OFF switch is set to OFF, then insert the 
microphone's 1/8 inch (3.5 mm) plug into the microphone jack on the audio 
device (mixer, amplifier, or recorder).

CAUTION:  Always turn off the microphone before you connect it to, or
          disconnect it from, the audio device.

Note:  If your audio equipment's microphone jack is a 1/4 inch (6.35 mm)
       type, use a 1/8 inch (3.5 mm) to 1/4 inch (6.35 mm) adapter plug
       (available at your local RadioShack store).

(EB 7/19/99)