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ENGLISH
EUROLIVE B212XL/B215XL User Manual
4
Optimal Operation3.
We have developed the B212XL/B215XL for use in a wide
range of possible applications. Of course, the sound of your loud-
speakers depends on the acoustic characteristics of the room/
space in which they are being used. The following chapters of
this manual will give you information about getting the most out
of your EUROLIVE speakers.
HF drivers3.1
High frequencies are the segment of the audio spectrum
responsible for clarity and speech intelligibility. These frequen-
cies are the easiest ones to locate, but at the same time they are
also the easiest ones to “obstruct.” Therefore, we recommend
positioning your speakers so that the HF drivers are located
slightly above the height of the audience. This guarantees the
best possible dispersion of high frequencies and considerably
higher intelligibility.
How to prevent feedback3.2
Always place the “front of house” speakers ahead of the micro-
phones (from the audience’s perspective), and never behind. Use
professional oor monitors or an in-ear monitoring system to
hear the stage performers.
How to avoid feedback 3.3
when working with record players
(DJ applications)
In applications with record players, bass feedback can occur.
Bass feedback occurs when low frequencies get back to the
pickup and are reproduced on the speakers. The most common
causes for this are: speakers located too closely to the record
player, a room with a wooden oor, or presence of a podium or
a platform. In such cases, it is best to move the speakers away
from the record player and “banish” them from the stage, so that
they are located on rm ground. Another option is to use raised
stands, which prevent the speakers from having a direct contact
with the ground.
Loudspeaker protection by using a 3.4
low-cut lter
Try to prevent damage to your speakers caused by extreme
oscillation of the bass membrane due to subsonic noise and
extremely deep frequencies. Use an equalizer to cut off those
frequencies that fall below your speakers’ frequency range,
or use a low-cut/high-pass lter. Most equalizers and
sound-improvement systems offer a low-cut function, like the
BEHRINGER ULTRAGRAPH DIGITAL DEQ1024, for example.
Using a low-cut lter in your signal path is particularly recom-
mended if you use record players or CD players as your signal
source. CD players often produce extremely deep frequencies,
which can lead to extreme excursions of the bass membrane.
Additional Considerations4.
Length and diameter of 4.1
loudspeaker cables
Loudspeaker cables whose diameter is too small can consider-
ably 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.
Power amp rating4.2
Selecting the right amp can turn out to be rather difcult.
Therefore, stick to the following rule of thumb: the power
rating of your amp should be roughly twice the speaker load
capacity. A speaker 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.
Fuses4.3
We do not recommend the use of fuses with audio applications.
Damage to loudspeakers can be the result of high peak signals
and high output power. However, fuses can only offer protection
from one of these two factors, and never from both. Additionally,
fuse resistors are sometimes nonlinear, leading to distortion and
unpredictable overdriving.
Protecting your equipment4.3.1
Always try to nd the optimal signal level. Try to 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 AUTOCOM PRO-XL MDX1600,
COMPOSER PRO-XL MDX2600 and MULTICOM PRO-XL
MDX4600 compressors offer an outstanding solution. All
models can be used as a limiter: the audio signal doesn’t
overdrive any more, and unpleasant “peaks” are effectively
avoided.
Our ULTRADRIVE PRO DCX2496 and SUPER-X CX3400/
CX2310 crossovers are particularly well-suited for pro-
tecting your equipment: for each output, they have
independent limiters.