8
EUROLIVE B415DSP
4. APPLICATION EXAMPLES
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 B415DSP.
Connecting a mixing console:
s
Turn the LEVEL controls
fully to the left.
s
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.
s
Switch on the B415DSP.
s
Raise the level of the mixing console output to a level of
0dB.
s
Turn the LEVEL controls
gradually clockwise to set
the volume of your choice. When the CLIP LEDs light up,
this indicates that the maximum volume has been reached.
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 B415DSP is
connected to each of the outputs of the signal source.
Connecting a stereo signal source:
s
Turn the LEVEL controls
fully to the left.
s
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.
s
Switch on the B415DSP.
s
Raise the output level of the stereo signal source (if
available), ensuring that it does not overload the input.
s
Turn the LEVEL controls
gradually clockwise to set
the volume of your choice.
Linking several B415DSP:
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 B415DSP on each stereo side and
interconnect them (see Fig. 3.3). 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.
s
Connect the LINE OUT connector
of the first B415DSP
to the MIC/LINE input of the next B415DSP.
+
With several B415DSP speakers connected to each
other, their input impedance will be reduced by half
(two B415DSPs), or to one third (three B415DSPs),
etc. Always use the output impedance of the mixing
console as a basis for your calculations!
Fig. 4.3: Linking several B415DSP speakers
