Behringer B215XL/B215XL-WH ユーザーズマニュアル

EUROLIVE B215XL/B215XL-WH/B212XL/B212XL-WH User Manual

We have developed the B212XL/B215XL 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.

High frequencies are the segment of the audio spectrum responsible 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 dispersion of high frequencies and considerably higher intelligibility.

Always place the “front of house” speakers ahead of the microphones (from the 

audience’s perspective), and never behind. Use professional floor monitors or an 

in-ear monitoring system to hear the stage performers.

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 floor, 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 firm ground. 

Another option is to use raised stands, which prevent the speakers from having a 

direct contact with the ground.

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 filter. Most equalizers and sound-improvement 

systems offer a low-cut function, like the BEHRINGER ULTRAGRAPH DIGITAL 

DEQ1024, for example.
Using a low-cut filter in your signal path is particularly recommended 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.

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.

Selecting the right amp can turn out to be rather difficult. 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.

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.

Always try to find 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.