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EUROLIVE PROFESSIONAL SERIES
Operating Modes 5
Optimal Operation2.
We have developed the EUROLIVE PROFESSIONAL SERIES for
use in a wide range of possible applications. Of course, the sound
of your loudspeakers 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 drivers2.1
High frequencies are the segment of the audio spectrum respon-
sible for clarity and speech intelligibility. These frequencies 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 dispersi-
on of high frequencies and a considerably higher intelligibility.
Directional pattern of asymmetrical HF drivers2.1.1
An outstanding feature of the B1220 PRO, B1520 PRO and the
B2520 PRO are their asymmetrically formed horns (“Asymmetrical
Dispersion Constant Directivity Horn”). By turning the horns 90°,
you can optimize the directional pattern for both vertical and ho-
rizontal speaker positioning. The default horn setting is the “front
of house” vertical conguration, whereby the wide dispersion
side (100°) is pointed downward and the narrow dispersion side
(50°) is pointed upward. If you want to position your speaker ho-
rizontally (as a “oor” monitor), you can modify the horn position
to assure optimal dispersion (turning the horn by 90°). Please do
the following:
Remove the speaker cover by carefully and uniformly pulling 1)
off the steel grill.
Unfasten the four screws with which the horn is mounted.2)
Turn the horn 90°, so that the wide dispersion side (100°) 3)
points upward when the loudspeaker is lying horizontally on
its side.
Mount the horn back into its place with the four previously 4)
unfastened screws.
Set the grill back into its place and press gently until it snaps 5)
into position.
No warranty claim is valid for damage caused by incor- +
rect handling or awed and/or careless use.
How to prevent feedback2.2
Always place the “front of house” speakers ahead of the mic-
rophones (from the audience’s perspective), and never behind.
Use professional oor monitors (e.g. B1220 PRO, B1520 PRO
or B2520 PRO) or an in-ear monitoring system to hear the stage
performers.
How to avoid feedback when working with 2.3
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 re-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 2.4
by using a low-cut lter
Try to prevent damage to your speakers caused by extreme oscil-
lation 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 recommen-
ded 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.
Operating Modes3.
BI-AMPING and PASSIVE operation 3.1
(B1800X PRO)
The EUROLIVE PROFESSIONAL SERIES subwoofer can run
in two ways: in PASSIVE and BI-AMPING mode. The B1800X
PRO can be switched from BI-AMPING to PASSIVE by using the
switch located in the back. For all applications, your EUROLIVE
speakers are connected using the speaker inputs.
Never switch the operating mode if your EUROLIVE +
speakers are wired to an active signal source.
The subwoofer features an internal crossover. Running the
B1800X PRO in passive mode makes it ideally suited for working
together with the 2-way B1220 PRO, B1520 PRO and B2520
PRO systems. This way, you achieve an absolutely balanced
sound characteristic. However, if you select the BI-AMPING mode,
your subwoofer can be combined with other EUROLIVE 2-way
systems. The BI-AMPING operating mode offers several primary
advantages: lower distortion, greater exibility of signal transmis-
sion as well as an improved overall performance of your system.
The PASSIVE operating mode has the advantage of requiring no
additional crossovers in order to keep the subwoofer’s frequency
range within its limits.
If you are using an external crossover, e.g. the BEHRINGER
ULTRADRIVE PRO DCX2496, pay attention to chapter 8, “Speci-
cations.” There, you will nd information about the recommended
crossover frequency range. We recommend a slope rate of at
least 12 dB, whereby a higher value guarantees the best possible
performance. A slope rate of 24 dB is ideal.
Our recommendations are only examples of possible interactions
between different EUROLIVE speakers. Depending on your own
personal sound requirements and the genre of the music being
played, other combinations are of course possible.
Looping through the subwoofer signal 3.2
(B1800X PRO)
The B1800X PRO subwoofer from the EUROLIVE PROFESSI-
ONAL SERIES features two speaker connectors. In BI-AMPING
mode, the PINS 2-/2+ of the input are connected directly with the
speaker. PINS 1-/1+ of the input are connected to the PINS 1-/1+
of the output and the signal can be simply looped through. To this
end, please adhere to the specications given in chapter 4.
Please keep in mind that when you switch the +
B1800X PRO subwoofer to BI-AMPING mode, the input
signal is routed to PINS 2-/2+. In this case, PINS 1-/1+
merely serve to loop the signal through!
PARALLEL Input 3.3
(B1220 PRO, B1520 PRO and B2520 PRO)
The EUROLIVE B1220 PRO, B1520 PRO and B2520 PRO louds-
peakers feature two speaker inputs laid out in parallel. You can
alternatively connect one of the connectors to the output on your
power amp and tap into the signal from the amp once again on
the second connector, in order to, for example, feed this signal
into an additional loudspeaker. This way, you can create stacks
consisting of speakers with different impedance values.
ATTENTION: Never connect the output signals of diffe- +
rent power amps to both parallel inputs at the same time.
This may permanently damage your setup.