Behringer B2030A ユーザーガイド
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TRUTH B2030A/B2031A
3. Applications
3.1 Connection
Use the enclosed power cord to connect the TRUTH to the mains.
To avoid ground loops, both speakers and the mixing console
should be fed from the same outlet. For your convenience, the
B2031A features an automatic power-up system which activates
the TRUTH as soon as a signal is present on its input, and
deactivates the speaker after signal pauses of more than five
minutes (only B2031A).
To avoid ground loops, both speakers and the mixing console
should be fed from the same outlet. For your convenience, the
B2031A features an automatic power-up system which activates
the TRUTH as soon as a signal is present on its input, and
deactivates the speaker after signal pauses of more than five
minutes (only B2031A).
Function: The switch for the automatic power-up system
(11)
has three positions. When set to OFF, the speaker is completely
switched off and cannot be activated with the POWER switch
( 6 ). Position AUTO allows the automatic operation as mentioned
above. In position ON, the B2031 is activated all the time and
can be switched off only with switch
switched off and cannot be activated with the POWER switch
( 6 ). Position AUTO allows the automatic operation as mentioned
above. In position ON, the B2031 is activated all the time and
can be switched off only with switch
( 6 ).
+ Be sure to switch the TRUTH off with the POWER
switch during longer pauses.
Now connect both speakers to your console by means of
commercial XLR or TRS cables. Since the TRUTH is an active
speaker system, instead of conventional speaker cables you
will need normal TRS or XLR cables.
commercial XLR or TRS cables. Since the TRUTH is an active
speaker system, instead of conventional speaker cables you
will need normal TRS or XLR cables.
Connect the TRUTH to the control room outputs of your console,
so as to be able to control the monitoring volume independently
of the main mix level. If your console does not have such outputs,
you can also use the main mix outputs. However, in this case
the speaker volume cannot be set independently of the main
mix level, i.e. you must adjust the monitoring volume on the
TRUTH. Please consult the operating instructions accompanying
your console to find out whether it has balanced or unbalanced
outputs. Connect these outputs to the TRS or XLR
so as to be able to control the monitoring volume independently
of the main mix level. If your console does not have such outputs,
you can also use the main mix outputs. However, in this case
the speaker volume cannot be set independently of the main
mix level, i.e. you must adjust the monitoring volume on the
TRUTH. Please consult the operating instructions accompanying
your console to find out whether it has balanced or unbalanced
outputs. Connect these outputs to the TRS or XLR
( 3 ) input. If
possible use the balanced connectors, so as to avoid interference
and hum. It won’t help, however, to connect unbalanced outputs
with balanced inputs. The benefits mentioned above will apply
only when both inputs and outputs are of the balanced type.
+ Be sure to mute the signal sources before you put the
and hum. It won’t help, however, to connect unbalanced outputs
with balanced inputs. The benefits mentioned above will apply
only when both inputs and outputs are of the balanced type.
+ Be sure to mute the signal sources before you put the
TRUTH into operation.
Once the TRUTH has been connected as described above, you
can activate the speaker with the POWER switch.
can activate the speaker with the POWER switch.
3.2 Level setting
When the TRUTH has been connected properly and switched
on, you can now turn up the console output that feeds the
B2030A/B2031A. Provided you have a signal source connected,
you now hear the audio material as it is played back by the
TRUTH. The INPUT TRIM control
on, you can now turn up the console output that feeds the
B2030A/B2031A. Provided you have a signal source connected,
you now hear the audio material as it is played back by the
TRUTH. The INPUT TRIM control
( 7 ) on the rear panel is set
to 0 dB ex-factory, i.e. unity gain, which is okay when you feed
the TRUTH from a pro-level console. In this case, the TRUTH
automatically operates at maximum level, provided that your
console has been set up correctly and its output is set to 0 dB.
the TRUTH from a pro-level console. In this case, the TRUTH
automatically operates at maximum level, provided that your
console has been set up correctly and its output is set to 0 dB.
The LIMIT LED
( 2 ) helps you control the level. It lights up as
soon as overloading causes one of the internal protections to
respond. The TRUTH doesn’t get damaged when the LIMIT LED
lights up with occasional signal peaks. However, please make
sure that it won’t light up all the time, because sooner or later
this will activate the thermal protection system and temporarily
mute the built-in amplifiers, to warn you that you are driving the
TRUTH too hard. If so, you can reduce levels either on your
console or using the INPUT TRIM control
respond. The TRUTH doesn’t get damaged when the LIMIT LED
lights up with occasional signal peaks. However, please make
sure that it won’t light up all the time, because sooner or later
this will activate the thermal protection system and temporarily
mute the built-in amplifiers, to warn you that you are driving the
TRUTH too hard. If so, you can reduce levels either on your
console or using the INPUT TRIM control
( 7 ). If the outputs on
your console don’t provide studio-level signals, you can turn up
the INPUT TRIM control. If you connect the TRUTH to the
preamp output of your stereo system, it may also be necessary
to raise the level on the TRUTH itself. To build up a rudimentary
stereo system, you can directly connect the outputs of a CD
player to the TRUTH’s inputs, and use the CD player to adjust
the volume.
+ The TRUTH is capable of producing high volume levels.
the INPUT TRIM control. If you connect the TRUTH to the
preamp output of your stereo system, it may also be necessary
to raise the level on the TRUTH itself. To build up a rudimentary
stereo system, you can directly connect the outputs of a CD
player to the TRUTH’s inputs, and use the CD player to adjust
the volume.
+ The TRUTH is capable of producing high volume levels.
You should mix your recordings at moderate levels,
so as to avoid listening fatigue and hearing impairment.
so as to avoid listening fatigue and hearing impairment.
3.3 Speaker placement suggestions
Since the sound of a speaker depends to a great extent on its
surroundings, placing your TRUTH correctly is very important.
Please try to follow these suggestions through. Your efforts will
be rewarded with better sound and higher resolution.
surroundings, placing your TRUTH correctly is very important.
Please try to follow these suggestions through. Your efforts will
be rewarded with better sound and higher resolution.
Both speakers are built identically. There is no need to concern
yourself with which speaker should be placed left and which
speaker should be placed right. Place the TRUTH on a flat and
stable surface, if possible use a dedicated speaker stand. In
this way, the speaker is acoustically decoupled and won’t induce
vibrations in nearby objects, which would affect the bass
response. If you cannot use a stand, put the TRUTH on spikes
or damping foam material. Another aspect is the distance
between speaker and wall: keep the speaker away from the
wall, as this would emphasize the bass response, particularly in
corners, where two walls form an angle.
yourself with which speaker should be placed left and which
speaker should be placed right. Place the TRUTH on a flat and
stable surface, if possible use a dedicated speaker stand. In
this way, the speaker is acoustically decoupled and won’t induce
vibrations in nearby objects, which would affect the bass
response. If you cannot use a stand, put the TRUTH on spikes
or damping foam material. Another aspect is the distance
between speaker and wall: keep the speaker away from the
wall, as this would emphasize the bass response, particularly in
corners, where two walls form an angle.
The BEHRINGER TRUTH B2030A/B2031A are so-called near-
field monitors, which means that the impact of the room acoustics
on the sound will be reduced considerably owing to the short
distance between speaker and listener.
field monitors, which means that the impact of the room acoustics
on the sound will be reduced considerably owing to the short
distance between speaker and listener.
Fig. 3.1: Incorrect speaker setup
This illustration shows how you shouldn’t do it: you can clearly
see that a portion of the sound bounces back from the walls
before it reaches the listener’s ears. Thus, direct and reflected
sound waves overlap which results in a coloration of the sound.
see that a portion of the sound bounces back from the walls
before it reaches the listener’s ears. Thus, direct and reflected
sound waves overlap which results in a coloration of the sound.
Fig. 3.2: Correct speaker setup
This effect can be reduced by turning the speakers towards the
listener. To make reflections from ceiling or floor less likely, the
tweeters should be on the same height as your ears. Please
note that the TRUTH should be operated vertically. Where this
is impossible, place it horizontally as shown in figure 3.3, to
allow for an improved stereo image.
listener. To make reflections from ceiling or floor less likely, the
tweeters should be on the same height as your ears. Please
note that the TRUTH should be operated vertically. Where this
is impossible, place it horizontally as shown in figure 3.3, to
allow for an improved stereo image.
Fig. 3.3: TRUTH setup horizontally
3. Applications
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