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6 EUROLIVE VP2520/VP1800S/VP1520/VP1220F/VP1220 User Manual
4. Additional Considerations
4.1 Length and diameter of loudspeaker cables
Loudspeaker cables whose diameter is too small can considerably limit the
power amp performance. The longer the cable, the more pronounced the
problem. As a result, musicians often simply “turn up” the amp, which can lead
to loudspeaker damage. Therefore, don’t use cables longer than 15 m (45 ft.).
For most applications, this will not be necessary. Cable diameter should be at
least 14 - 12 gauge.
4.2 Power amp rating
Selecting the right amp can turn out to be rather dicult. Therefore, stick to
the following rule of thumb: the power rating of your amp should be roughly
twice the loudspeaker load capacity. A loudspeaker rated at 200 Watts
continuous performance can easily be powered by an amp rated at 400 Watts
output power. An optimal addition to your speaker system would be the
BEHRINGER EUROPOWER EP2000 power amp, for example.
4.3 Fuses
We do not recommend the use of fuses with loudspeaker applications. Damage to
loudspeakers can be the result of high peak signals and high output power.
However, fuses can only oer protection from one of these two factors, and never
from both. Additionally, fuse resistances are sometimes nonlinear, leading to
distortion and unpredictable overdriving.
4.4 Protecting your equipment
• Always try to nd the optimal signal level. Avoid overdriving your amp
• Keep in mind the physical limitations of your PA system
• Use a limiter to restrict the output signal level. Place the limiter between
the mixing console and the power amp. For this purpose, our proven
AUT O-XL MDX1600, COMPOSER PRO-XL MDX2600 and MULTICOM PRO-XL
MDX4600 compressors oer an outstanding solution. All models can be used
as a limiter: the audio signal doesn’t overdrive any more, and unpleasant
peaks” are eectively avoided
Our ULTRADRIVE PRO DCX2496 and SUPER-X CX3400/CX2310 crossovers
are particularly well-suited for protecting your equipment: for each
output, they have independent limiters.
5. Application Examples
5.1 Full-range stereo operation
This example applies to the VP1220, VP1220F, VP1520, and VP2520.
In this example, the main output signal of a mixing console is connected
to a power amplier. Both the outputs and inputs are stereo. A full-range
VP series loudspeaker is connected to each of the amplier outputs, and these
loudspeakers reproduce the entire frequency range.
EP2000VP1520
XENYX 1202FX
L R
Fig. 5.1: Full-range stereo operation
5.2 Full-range stereo operation
with oor monitors
This example applies to the VP1220, VP1220F, VP1520, and VP2520.
This example is a variation of the example above, with the addition of several
VP1220F oor monitors. Two separate monitor outputs from the mixing
console are connected to the inputs of a stereo power amplier. A VP1220F is
connected to each amplier output, and a second VP1220F is connected to the
parallel outputs of the rst set of VP1220F monitors.
L
AUX 1
SEND
AUX 2
SEND
R
EP2000
VP1220
VP1220F
X2442USB
Fig. 5.2: Full-range stereo operation with oor monitors
6


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