Pa Systems - Behringer EUROLIVE B1220DSP User Manual

7
EUROLIVE B1220DSP User Manual
◊
Never place a microphone directly in front of the loudspeaker owing to
danger of feedback! When operating the B1220DSP make sure that you
always stay behind the loudspeaker to avoid feedback.
EUROLIVE B1220DSP (optional)
Fig. 4.1: Connecting microphones

4.2 PA systems

PA is short for "public address" and includes all applications that involve a larger
audience. This example uses a mixing console as its central unit for system
operation and connections. All microphones, feeding and effects devices,
etc. are connected to the mixing console, which is then linked to the B1220DSP.
Connecting a mixing console:
• Turn the LEVEL controls (3) fully to the left
• Connect the left output of the mixing console to the MIC/LINE connector
of the left loudspeaker, and the right mixing console output to the
right loudspeaker
• Switch on the B1220DSP
• Raise the level of the mixing console output to a level of 0 dB
• Turn the LEVEL controls (3) gradually clockwise to set the volume of your
choice. When the CLIP LEDs light up, this indicates that the maximum
volume has been reached
EUROLIVE B1220DSP (L)
Main Out L
X2442USB
Fig. 4.2: Connecting a mixing console
EUROLIVE B1220DSP
EUROLIVE B1220DSP (R)
Main Out R
Instead of a mixing console, you can also connect a stereo signal source,
e.g. a CD player. In this case, one B1220DSP is connected to each of the outputs of
the signal source.
Connecting a stereo signal source:
• Turn the LEVEL controls (3) fully to the left
• Connect the left output of the stereo device to the MIC/LINE connector of
the left loudspeaker, and the right stereo device output to the MIC/LINE
connector of the right loudspeaker
• Switch on the B1220DSP
• Raise the output level of the stereo signal source (if available), ensuring that
it does not overload the input
• Turn the LEVEL controls (3) gradually clockwise to set the volume of
your choice
Linking several B1220DSP:
If you need more sound pressure, for example in larger rooms, simply increase
the number of loudspeakers on each stereo side. You could place two B1220DSP
on each stereo side and interconnect them (see Fig. 4.3). The loudspeakers can be
stacked or placed one beside the other. When you stack the speakers, the carrying
recesses built into the cabinets ensure the stability of the stack. You can connect
a microphone, a mixing console or stereo signal source.
• Connect the LINE OUT connector (6) of the first B1220DSP to the MIC/LINE
input of the next B1220DSP
◊ With several B1220DSP speakers connected to each other, their input
impedance will be reduced by half (two B1220DSPs), or to one third
(three B1220DSPs), etc. Always use the output impedance of the mixing
console as a basis for your calculations!
EUROLIVE B1220DSP
Mic/Line 1
Line Out
Mic/Line 1
Main Out L
X2442USB
Fig. 4.3: Linking several B1220DSP speakers
EUROLIVE B1220DSP
Mic/Line 1
Line Out
Mic/Line 1
Main Out R