Genelec 7040A Bruksanvisning

Genelec Subwoofer 7040A

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7040A Operating Manual
操作手册
Genelec 7040A Active Subwoofer
真力 有源低音音箱 7040A
Introduction
Congratulation and thank you for choosing
Genelec!
Since 1978, Genelec has been guided by a
single idea – to make perfect active monitors
that deliver neutral and accurate sound in
every kind of acoustical environment. In
Genelec’s quest for this ultimate goal, our
unrivalled commitment to research and
development has led us to continuously
develop innovative driver technology,
electronic circuitry, enclosure designs and
many more. Our design philosophy is based
on sustainability and environmental values,
where industrial design serves our product
acoustical performance.
Your Genelec product has been designed
and manufactured with care in our factory,
in Finland, using environmentally efficient
solutions to give you reliable operation over
many years.
Please take the time to read this manual.
Happy monitoring!
General Description
The Genelec 7040A is a very compact active
subwoofer for reproducing low frequencies.
The 7040A extends the bass reproduction
of Genelec 8010, 8020 and M030 active
monitors for stereo applications. Using the
7040A extends their frequency responses
down to 30 Hz (-6 dB).
Driver
The 7040A contains one 165 mm (6.5
in) magnetically shielded driver, housed
in Genelec Laminar Spiral EnclosureTM
(LSE™).
Bass Management
Balanced XLR connectors are used for the
audio inputs and outputs. There are two
input connectors and two outputs.
The bass management unit in the 7040A
subwoofer splits the input into low and
high frequency components at 85 Hz.
Frequencies below 85 Hz are reproduced
by the subwoofer. Frequencies above 85
Hz are directed via the subwoofer's output
connectors to the main monitors. The
subwoofer's outputs have the same level as
the inputs.
The subwoofer sensitivity can be adjusted
from +12 to -6 dBu to match the subwoofer
sound level easily with different monitors.
Two "BASS ROLL-OFF" switches provide
bass response adjustment to compensate
for the acoustical environment in three 2
dB steps. Two switches allow alignment
of subwoofer phase with the monitors.
The phase can be adjusted in 90 degree
increments between 0° and -270°.
Amplier
A Class D power amplifier produces 50
W output power with very low THD and
IM distortions. Driver overload protection
is included in the amplifier circuitry. The
a m p l i f i er a l s o i n c or p o r a t es t h e r m a l
overload and short circuit protections.
The power supply accepts mains voltages
from 100 to 240 VAC.
ISS™ Autostart
The 7040A is equipped with Intelligent
Si g na l Se n s i n g T M (ISS™) aut om a t i c
start funct ion. ISS turns t he amplifier
to standby mode if no input signal has
been detected for one hour. The power
consumption in standby mode is less
than 0.5 watts. Playback automatically
resumes once an input signal is detected.
There is a slight delay in the automatic
powering up. In those environments where
the 7040A is required to be on all of the
time, the ISS function can be disabled
by setting the “ISS DISABLE” switch to
the “ON” position. Then the subwoofer
is c ont i n u ou s ly p owered a n d can be
turned off using the power switch on the
connector panel. The default position
from the factory is with "ISS DISABLE" in
the OFF position.
Installation
The subwoofer is supplied with a mains
cable and this operating manual. After
unpac king i nspec t the subwoofer for
possible damage in transport . Ensure
that the subwoofer and the monitors are
powered off before connecting cables.
Genelec 7040A Active Subwoofer
Audio connections to the subwoofer and
monitors use balanced XLR cables (not
included in the subwoofer delivery content).
As the 7040A has an integrated amplifier,
it may only be connected to a line level
signal source, such as a mixing console or
preamplier, never to the loudspeaker outputs
of a power amplier or an integrated amplier.
The source is connected to the "LEFT IN"
and "RIGHT IN" connectors of the subwoofer.
The subwoofer’s output connectors "LEFT
OUT" and "RIGHT OUT" are connected to the
monitors.
If the signal source has unbalanced RCA
outputs, you can use signal cables as shown
in Figure 2.
Once all connections have been made, the
subwoofer and monitors can be powered up.
Positioning In The Room
Placement of the subwoofer in the room
affects the subwoofer frequency response
and sound level dramatically, as the room
influences the low frequencies strongly.
Even a slight change in the subwoofer's
location can make a marked difference in
the frequency balance. Often patient and
methodical experimentation is needed to
nd the optimum placement. The placement
will also affect the phase alignment between
the monitors and the subwoofer, as well as
the need for bass roll-off adjustment.
First, place the subwoofer slightly offset
from t he center of the front wall. T he
distance to the nearest wall should be
less than 0.6 m (24 in) measured from the
subwoofer's driver. This position increases
acoustic loading and sound output due
to the proximity of the wall and floor. Too
large a distance from the wall can cause
cancellations and reduce subwoofer output.
The monitor should be placed at least 1.1 m
(43 in) away from walls to avoid reduction of
low frequency output (see Figure 3).
If the subwoofer frequency response does
not seem balanced, move the subwoofer
slightly to the left or right. This changes
how the room modes are excited and can
result in improved flatness. Positioning
the subwoofer close to a corner boosts
the subwoofer outpu t but may cause
as ymm et ri c al spa t ia l i m a ging at low
frequencies.
Operating Environment
The 7040A subwoofer is designed for indoor
use only. The ambient temperature should
be 15-35 °C (50-95 °F) and the relative
humidity 20-80 %. Condensation is not
allowed. If it has been stored or transported
in a cool environment, the product must be
allowed to warm up in its packing to the
ambient temperature before connecting
mains power.
Sufficient amplifier cooling and reflex
port functioning is required when t he
>110 cm (43 in)
Main
monitor
< 60 cm (24 in)
Figure 3. Recommended distances to
the front wall
Figure 1. 7040A's amplifier panel, connectors and controls.
Figure 2. XLR to RCA connector for
connecting to an unbalanced signal source.
MADE IN FINLAND
www.genelec.com
7040A ACTIVE SUBWOOFER
MAGNETICALLY SHIELDED
SERIAL
NUMBER
LEFT OUT
LEFT IN
RIGHT OUT
RIGHT IN POWER
ON
ROLL-OFF
-180°
-90°
-4 dB
-2 dB -270°
ISS-DISABLE
MAINS INPUT
50 / 60 Hz 70 W
100 - 240 V~
-6
0
+6
+3
+12
-3
-4
dBu
SENSITIVITY
FOR 100 dB
SPL @ 1m
SIGNAL INPUT
CONNECTORS
SIGNAL OUTPUT
CONNECTORS
BASS ROLL-OFF
PHASE AND
ISS DISABLE
SWITCHES
MAINS INPUT
POWER SWITCH

Produktspecifikationer

Varumärke: Genelec
Kategori: Subwoofer
Modell: 7040A

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