Behringer B1520DSP User Guide
7
EUROLIVE B1520DSP
To avoid feedback, it is recommended that you carefully select
and direct the microphones used. Basically, you should use
microphones with a high directivity, i.e. with a cardioid or hyper-
cardioid polar pattern. Never hold a microphone so that its main
pick-up area points directly towards the loudspeaker. When you
hold it with its less sensitive side towards the speaker box, you
can move closer to the speaker.
+ If you encounter persistent feedback problems,
and direct the microphones used. Basically, you should use
microphones with a high directivity, i.e. with a cardioid or hyper-
cardioid polar pattern. Never hold a microphone so that its main
pick-up area points directly towards the loudspeaker. When you
hold it with its less sensitive side towards the speaker box, you
can move closer to the speaker.
+ If you encounter persistent feedback problems,
consider using our proven FEEDBACK DESTROYER
PRO FBQ2496 for line-level signals. For signals with
line or microphone level, we recommend our
BEHRINGER SHARK DSP110.
PRO FBQ2496 for line-level signals. For signals with
line or microphone level, we recommend our
BEHRINGER SHARK DSP110.
4. Application examples
4.1 Presentations
With just one B1520DSP and one or two dynamic microphones,
you can set up a basic audio system with very little effort. Thanks
to the built-in mixer section, you can connect the microphones
directly to the B1520DSP. Mount the B1520DSP on a speaker
stand for optimum presentation and intelligibility of
announcements. If one B1520DSP is not enough, you can, of
course, use a second or even more loudspeakers.
you can set up a basic audio system with very little effort. Thanks
to the built-in mixer section, you can connect the microphones
directly to the B1520DSP. Mount the B1520DSP on a speaker
stand for optimum presentation and intelligibility of
announcements. If one B1520DSP is not enough, you can, of
course, use a second or even more loudspeakers.
Connecting microphones:
= Turn the LEVEL controls ( 3 ) fully to the left.
= Connect your microphones to the MIC/LINE inputs.
= Switch on the B1520DSP.
= Turn the LEVEL controls ( 3 ) gradually clockwise to set the
= Turn the LEVEL controls ( 3 ) fully to the left.
= Connect your microphones to the MIC/LINE inputs.
= Switch on the B1520DSP.
= Turn the LEVEL controls ( 3 ) gradually clockwise to set the
volume of your choice. Observe the CLIP LEDs while
adusting the volume. Make sure they never shine constantly
but only light up at peak levels.
adusting the volume. Make sure they never shine constantly
but only light up at peak levels.
= Use the LINE OUT connector ( 6 ) to connect an (optional)
second B1520DSP.
+ Never place a microphone directly in front of the
loudspeaker owing to danger of feedback! When
operating the B1520DSP make sure that you always
stay behind the loudspeaker to avoid feedback.
operating the B1520DSP make sure that you always
stay behind the loudspeaker to avoid feedback.
Fig. 4.1: Connecting microphones
(11) The TIMED TURNOFF switch activates the automatic turn-
off function:
ON
When the switch is pressed (ON position), the automatic
turn-off function is activated. The loudspeaker is turned
off automatically when it receives no signal for more than
3 minutes. As soon as a signal is received, the loudspeaker
is switched back on.
turn-off function is activated. The loudspeaker is turned
off automatically when it receives no signal for more than
3 minutes. As soon as a signal is received, the loudspeaker
is switched back on.
OFF
When the switch is pressed (OFF position), the loud-
speaker remains switched on and can only be deactivated
with the POWER switch
speaker remains switched on and can only be deactivated
with the POWER switch
( 2 ).
(12) A noise-gate allows you to eliminate unwanted noise during
signal pauses. This is done by a circuit that mutes the
output when the signal level drops below a preset threshold.
Use the NOISE GATE control to determine the threshold
below which the noise-gate closes.
output when the signal level drops below a preset threshold.
Use the NOISE GATE control to determine the threshold
below which the noise-gate closes.
(13) The TH LED lights up as soon as the signal level drops
below the threshold value adjusted with the NOISE GATE
control
control
(12) (the noise-gate closes).
3. Setting up the B1520DSP
The sound of your B1520DSP largely depends on the room
acoustics. Please observe the following hints to get the most
out of your B1520DSP.
acoustics. Please observe the following hints to get the most
out of your B1520DSP.
3.1 Tweeter
High frequencies are the very part of the audio spectrum that
ensure a clear perception of sound and speech intelligibility.
Although these frequencies can be located most easily, they
are also the first to be blocked acoustically. We therefore
recommend that you set up your speakers on speaker stands
(not included), so that the tweeter radiates its signals slightly
above the heads of the audience. This will ensure both an
optimum dispersion of the high-frequency content and a
considerably improved speech intelligibility.
ensure a clear perception of sound and speech intelligibility.
Although these frequencies can be located most easily, they
are also the first to be blocked acoustically. We therefore
recommend that you set up your speakers on speaker stands
(not included), so that the tweeter radiates its signals slightly
above the heads of the audience. This will ensure both an
optimum dispersion of the high-frequency content and a
considerably improved speech intelligibility.
Fig. 3.1: B1520DSP mounted on a stand
3.2 How to avoid feedback
Always place the microphones (viewed from the audience)
behind the B1520DSP, never in front of it (Fig. 3.2). When you
wish to adjust the controls on the B1520DSP while holding a
microphone, please approach the loudspeaker from the rear to
avoid feedback.
behind the B1520DSP, never in front of it (Fig. 3.2). When you
wish to adjust the controls on the B1520DSP while holding a
microphone, please approach the loudspeaker from the rear to
avoid feedback.
Fig. 3.2: Right and wrong positioning
4. Application examples
EUROLIVE B1520DSP
(optional)
EUROLIVE B1520DSP