Vocopro DA2277 User Manual

• Every wireless microphone system must operate on a specific frequency range.

• The government dictates the frequency ranges available for use with consumer wireless devices. 

• Wireless frequencies are shared with TV stations, communications equipment and a large number of wireless 
   microphone systems. 

• Because of frequency sharing, there is always at least a small chance that someone else in the area might be 
   using the same frequency as your wireless system. 

• There must be one transmitter and one receiver to make a complete wireless system, and they both must be on 
   the same frequency. 

• If the frequencies of any two wireless systems are too close together, interference is likely, and one or both 
  systems will probably be compromised.

• The practical maximum operating range of a wireless system will vary from as little as 100 feet (30 m) in heavily 
   crowded indoor situations to 150 feet (40 m) In low crowded situation.

• Wireless receivers must have either one or two external antennas, and there should be a clear open-air path 
   between these antennas and the transmitter. 

• Weak or worn-out transmitter batteries are a common cause of wireless problems, including complete failure, 
   poor range, distorted audio and interference. 

The DA-2277 wireless microphones are ideal for close-up vocals and can be held in the hand or mounted on a 
microphone stand. The most common applications and placement techniques are listed below. Keep in mind that 
microphone technique is largely a matter of personal taste—there is no one "correct" microphone position.

Lips should be less than 3" from or even touching the windscreen on an axis to the microphone. Doing this 
creates a robust sound, emphasizes bass and provides maximum isolation from other sources.

When giving a speech or simply speaking, place the microphone 4" to 10" away from the mouth, just above nose 
height for a natural sound with reduced bass. You can also place the microphone 8" to 16" away from the mouth, 
slightly off to one side, for a more "distant" sound with highly reduced bass and minimal "s" sounds.

When the sound source is less than 1/4 in. from the microphone, the microphone boosts bass frequencies 
(by 6 to 10 dB at 100 Hz), creating a warmer and richer bass sound than when farther away. This effect, known 
as proximity effect, happens only in unidirectional dynamic microphones like those used with the DA-2277.