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8 EUROLIVE B1520DSP User Manual
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 eects devices, etc. are
connected to the mixing console, which is then linked to the B1520DSP.
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 B1520DSP
• 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
X2442USB
XM8500
EUROLIVE B1520DSP EUROLIVE B1520DSP
Main Out L Main Out R
Fig. 4.2: Connecting a mixing console
Instead of a mixing console, you can also connect a stereo signal source, e.g. a
CD player. In this case, one B1520DSP 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 B1520DSP
• 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 B1520DSP:
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 B1520DSP
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, thecarrying
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 rst B1520DSP to the MIC/LINE
input of the next B1520DSP
◊ With several B1520DSP speakers connected to each other, their input
impedance will be reduced by half (two B1520DSPs), or to one third
(three B1520DSPs), etc. Always use the output impedance of the mixing
console as a basis for your calculations!
X2442USB
Mic/Line 1
EUROLIVE B1520DSP EUROLIVE B1520DSP
Line Out Line Out
Mic/Line 1
Mic/Line 1
Main Out L Main Out R
Mic/Line 1
Fig. 4.3: Linking several B1520DSP speakers
4.3 Other uses
Monitoring:
When used as a monitor, the B1520DSP receives its audio signal from the monitor
or aux output of the mixing console. If additional B1520DSPs are to be used, you
can loop the audio signal from the rst speaker to the next B1520DSP using the
line output. The sound and volume of each B1520DSP can be adjusted with their
own operating elements (3) (L E V EL), (7) (EQ HIGH) and (8) (EQ LOW).
Keyboard amplication:
Guitarists and bassists usually have their own ampliers on stage to make
sure they can hear their own instrument - even when no monitors are used.
Inparticular on smaller stages, the power delivered by these amps is enough to
match the volume produced by other sound sources on stage. Things are dierent
with keyboards and synthesizers as these usually have no built-in speakers.