Angle Of Incidence; Feedback; Backing Vocals; Multichannel Systems - AKG WMS 4000 Modo De Empleo

4 Operating Notes

4.6.2 Angle of Incidence

Refer to fig. 5.

4.6.3 Feedback

Refer to fig. 6.

4.6.4 Backing Vocals

Refer to fig. 7.

4.7 Multichannel Systems

4.8 Battery Care

5 Cleaning

6 Error Messages

Display Error Message
Err.>rF<
Err.>SYS<
Err.>USr<
24
Proximity effect is a more or less dramatic boost of low frequencies that occurs when you sing into the
microphone from less than 2 inches. It gives more "body" to your voice and an intimate, bass-heavy
sound.
Sing to one side of the microphone or above and across the microphone's top. This provides a well-bal-
anced, natural sound.
If you sing directly into the microphone, it will not only pick up excessive breath noise but also overem-
phasize "sss", "sh", "tch", "p", and "t" sounds.
Feedback is the result of part of the sound projected by a speaker being picked up by a microphone, fed
to the amplifier, and projected again by the speaker. Above a specific volume or "system gain" setting
called the feedback threshold, the signal starts being regenerated indefinitely, making the sound system
howl and the sound engineer desperately dive for the master fader to reduce the volume and stop the
howling.
To increase usable gain before feedback, plasce the main ("FOH") speakers in front of the microphones
(along the front edge of the stage).
If you use monitor speakers, be sure never to point any microphone directly at the monitors.
Feedback may also be triggered by resonances depending on the acoustics of the room or hall. With res-
onances at low frequencies, proximity effect may cause feedback. In this case, it is often enough to move
away from the microphone a little to stop the feedback.
1. Never let more than two persons share a microphone.
2. Ask your backing vocalists never to sing more than 35 degrees off the microphone axis.
The microphone is very insensitive to off-axis sounds. If the two vocalists were to sing into the micro-
phone from a wider angle than 35 degrees, you may end up bringing up the fader of the microphone
channel far enough to create a feedback problem.
If reception on the selected carrier frequency is poor, use Auto Channel Setup on the receiver to find the
next clean Subchannel within the selected Frequency Group.
Should you find no clean Subchannel, use Auto Group Setup on the receiver to select a different Frequency
Group within the same Preset and selecet a new frequency for each transmiter and receiver.
1. If you know you won't be using the transmitter fo more than a week, remove the batteries or BP 4000
battery pack from the transmitter.
2. Make it a habit to charge the BP 4000 battery pack fully every time you used the transmitter for at
least one or two hours. This is a good way to prevent the battery pack from dying in the middle of the
next gig.
3. Always charge the BP 4000 battery pack fully if you stroe it outside the transmitter. This will maintain
the batery pack's capacity at a higher level for a longer time.
To clean the transmitter surfaces, use a soft cloth moistened with water.
The following error messages may appear on the display upon powering up or during operation:
Problem
PLL error. (Receiver unable to lock on to select-
ed frequency.)
Frequency settings cannot be changed.
Last setting cannot be loaded.
Remedy
1. Press jog switch briefly and set different fre-
quency.
2. If problem persists, contact your AKG
Service Center.
1. Switch power to transmitter OFF and back
ON after about 10 seconds.
2. If problem persists, contact your AKG
Service Center.
1. Set frequency again.
2. If problem occurs frequently, contact your
AKG Service Center.