Behringer Eurolive Speakers B1800X - Manual (Page 7)

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EUROLIVE SERIES
2. OPTIMUM PERFORMANCE
The EUROLIVE SERIES was designed for use in a variety of applications. Naturally, the sound of your speaker
enclosures largely depends on the acoustic properties of the environment in which it is used. The following
points should help you get the most out of your EUROLIVE speaker system.
2.1 HF driver
High frequencies are a crucial part of the audio spectrum, which ensures clear sound and speech intelligibility.
Whereas these frequencies are the most easily located, they are also the first to be acoustically blocked. We
therefore recommend that you set up your speakers so that the HF driver is situated slightly above the heads
of the audience. This will ensure not only optimal dispersion of the high-frequency content, but also considerably
improved speech intelligibility and clarity.
2.2 Avoiding feedback
Always place the “front-of-house” speakers (the enclosures facing the audience) in front of the microphones.
Use professional floor wedges (e.g. EUROLIVE F1220 or F1520), so that the performers on stage can hear
themselves.
2.3 Avoiding feedback when using turntables (e.g. DJ applications)
Turntables often produce low-end feedback: low frequencies are fed back to the pickup arm and cartridge and
reproduced again by the speakers. Common causes of low-end feedback are speakers set up too close to the
turntable, rooms with a wooden floor or elements placed on the stage. In such cases, try moving the speakers
away from the turntable or off the stage and placing them on a solid support. Another possibility is to mount the
enclosures on stands, thus minimizing direct contact between floor and speakers.
2.4 Protecting your speakers with a low-cut filter
Low-frequency rumble or extreme low frequencies can lead to an excessive displacement of the speaker
diaphragm and in turn to permanent damage. Using an equalizer or a low-cut/high-pass filter to eliminate the
low frequencies below the response curve of the speaker can effectively prevent this. Most equalizers and
sound enhancers provide a low-cut function (e.g. BEHRINGER ULTRA-GRAPH PRO GEQ3102).
The use of a low-cut filter in the signal path is especially recommended when using turntables and/or
CD players as signal sources. CD players often produce extremely low frequencies, which can lead to excessive
diaphragm displacement.
3. OPERATING MODES
With the exception of the B1020, all EUROLIVE SERIES multi-way systems can be operated in two various
modes: FULL-RANGE and BI-AMPING. The subwoofers can either be operated in ACTIVE (BI-AMPING) or
PASSIVE mode. Use the switch on the rear panel of the enclosure to select the appropriate mode for your
application (see chapter 3.3). In both modes, the speakers are connected using the Speakon ® inputs.
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Never change the operating mode while an audio signal is present.
3.1 FULL-RANGE operation
All EUROLIVE models are equipped with a built-in passive crossover network, which ensures a smooth transition
between the individual frequency ranges in FULL-RANGE mode. This mode is particularly suitable for applications
that require only a small-scale setup, such as speech applications in churches and schools, sound reinforcement
in small clubs etc.
3. OPERATING MODES