beautypg.com

Eurolive performer series, Optimal operation, Subwoofer operating modes – Behringer E1220 User Manual

Page 5

background image

5

EUROLIVE PERFORMER SERIES

3. SUBWOOFER OPERATING MODES

2. OPTIMAL OPERATION

We have developed the EUROLIVE PERFORMER 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.

2.1 HF drivers

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.

2.2 How to prevent feedback

Always place the “front of house” speakers ahead of the

microphones (from the audience’s perspective), and never

behind. Use professional floor monitors (e.g. E1220 or E1520) or

an in-ear monitoring system to hear the stage performers.

2.3 How to avoid feedback 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 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 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.

2.4 Loudspeaker protection

by using a low-cut filter

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.

3. SUBWOOFER OPERATING MODES

3.1 BI-AMPING and PASSIVE operation (E1800X)

The EUROLIVE PERFORMER SERIES subwoofer can run in

two ways: in PASSIVE and BI-AMPING mode. The E1800X 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

E1800X in passive mode makes it ideally suited for working

together with the 2-way E1220 and W1520 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 flexibility of signal transmission 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, “SPECIFICATIONS.” There, you will find 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.

3.2 Looping through the subwoofer signal

(E1800X)

The E1800X subwoofer from the EUROLIVE PERFORMER

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 specifications given in chapter 4.

+

Please keep in mind that when you switch the

E1800X 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!

This manual is related to the following products: