AKG C 900 Mode D'emploi page 18

3 Using Your Microphone
Refer to fig. 8.
3.5 Backing
Vocals
Fig. 9: Two vocalists
sharing a micro-
phone.
3.6 Installing the
PB 1000
Fig. 10: Capsule
without (a) and with
(b) PB 1000.
Important!
18
threshold, the signal starts being regenerated indefinitely, mak-
ing the sound system howl and the sound engineer des-
perately dive for the master fader to reduce the volume and
stop the howling.
To increase usable gain before feedback, the microphone has a
cardioid polar pattern. This means that the microphone is most
sensitive to sounds arriving from in front of it (your voice) while
picking up much less of sounds arriving from the sides or rear
(from monitor speakers for instance).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 micro-
phone directly at the monitors, or at the FOH speakers.
Feedback may also be triggered by resonances depending on
the acoustics of the room or hall. With resonances at low fre-
quencies, proximity effect may cause feedback. In this case, it
is often enough to move away from the microphone a little to
stop the feedback.
end up bringing up the fader of the microphone channel far
enough to create a feedback problem.
a
sule to the stop, slightly turning the attachment as you push
it home.
When installing or removing the PB 1000, make sure to grip
the capsule and shock mount firmly with your thumb and
forefinger in order to prevent the capsule being severed
from the shock mount.
1. Never let more than two
persons share a micro-
phone.
2. Ask your backing vocalists
never to sing more than
35 degrees off the micro-
phone axis.
The microphone is very
insensitive
sounds. If the two vocalists
were to sing into the micro-
phone from a wider angle
than 35 degrees, you may
b
to off-axis
1. Unscrew and
remove the wire
mesh cap.
2. Slip the PB 1000
on the m i c r o -
p h o n e c a p -