Behringer Eurolive Professional B1800X PRO 사용자 설명서

EUROLIVE B2520 PRO/B1800X PRO/B1520 PRO/B1220 PRO User Manual

The EUROLIVE B1220 PRO, B1520 PRO and B2520 PRO loudspeakers 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. 

PINS 1-/1+

PINS 2-/2+

PASSIVE

INPUT: Full-range input  

OUTPUT: highpass output

Signal loop

BI-AMPING

Signal loop

Subwoofer input

Tab. 4.1: Pin assignment

Feed the full-range signal to the input PINS 1-/1+. The high-pass signal 

can be tapped into at the output PINS 1-/1+. PINS 2-/2+ serve as a signal 

loop through

Connect the subwoofer signal to PINS 2-/2+

PINS 1-/1+ of the input are connected to PINS 1-/1+ of the output, and can 

be used to loop the signal through

In general, when in BI-AMPING mode, PINS 1-/1+ and PINS 2-/2+ are 

looped through

Loudspeaker cables whose diameter is too small can limit the power amp 

performance considerably. The longer the cable, the greater 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 2.5 - 4.0 mm

2

.

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 400 Watts continuous performance 

can easily be powered by an amp rated at 800 Watts output power. An optimal 

addition to your speaker system would be the BEHRINGER EUROPOWER EP2500 

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

In the following example, the main stereo output signal of a mixing console 

is connected to a stereo power amplifier. A B1220 PRO is connected to each of 

the amp outputs, and these speakers reproduce the entire frequency range 

(full range).

XENYX 1202FX 

2 x EUROLIVE PROFESSIONAL B1220 PRO

EUROPOWER EP2000

L

R

Fig. 6.1:Full-range stereo operation