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Positioning the dB500a
Microphone Positioning - How to Reduce Feedback
Feedback is the annoying howling and squealing that is heard when the
microphone gets too close to the speaker and the volume is high. You
get feedback when the microphone picks up the amplified signal from
the speaker, and then amplifies through the speaker again, and then
picks it up again, and so on and so on. In general, it is always recom-
mended that any LIVE mic (a mic that’s on) is positioned behind the
speaker enclosures. This will give you the best level from your system
before feedback. One possible exception is when you are adjusting the
sounds of the microphones, since you want to listen in front of the
speaker to hear properly. To do this, lower your mixers MAIN VOLUME
while setting the EQ and effect from in front of the speakers. Once you
have the sound you like, move the microphones to behind the speakers
and raise the Main volume.
Speaker Placement
Whenever possible, it is a good idea to raise the speakers above the
heads of the listening audience. The dB500a enclosures’ feature stan-
dard 1 3/8” pole mount receptacles, which are compatible with speaker
stands from a variety of manufacturers. In a smaller setting like a school
cafeteria, library, or a mall kiosk, you can also use the dB500a in one of
the tilt back monitor positions, which will improve the projection of the
speakers and may eliminate the need for speaker stands.
Using the dB500a as a Floor Monitor
The dB500a is an ideal solution for stage
monitoring and thanks to its unique design,
two wedge monitor positions are possible.
When placed on its side with the high fre-
quency horn facing to the left of the enclo-
sure, the dB500a is tilted at a fifteen
degree angle, optimizing performance
when used on a large stage. When placed
on its side with the high frequency horn
facing to the right of the enclosure, the
dB500a is tilted at a thirty degree angle
optimizing performance when used on
smaller stages. In a large stage monitor
system, several dB500a’s can be daisy-
chained together using the Line Output. In
many instances (when using the dB500a
as a monitor system) you may choose to
use an external equalizer like the Samson
S Curve 131 to increase the volume and
reduce the chance of feedback. In this
case be sure to set the HIGH and LOW
EQ to the 12:00 or flat position.