Bass Management - Genelec 8010A Operating Manual

Genelec 7040A Active Subwoofer
Introduction
Congratulation and thank you for choosing
Genelec!
Since 1978, Genelec has been guided by
a single idea – to make perfect active moni-
tors 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 continu-
ously develop innovative driver technol-
ogy, 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 fre-
quencies. The 7040A extends the bass
reproduction of Genelec 8010, 8020 and
M030 active monitors for stereo applica-
tions. Using the 7040A extends their fre-
quency 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 Enclosure
(LSE TM ).

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. Frequen-
cies below 85 Hz are reproduced by the
subwoofer. Frequencies above 85 Hz are
directed via the subwoofer's output connec-
tors 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 pro-
vide bass response adjustment to compen-
sate 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 incre-
ments between 0° and -270°.
Amplifier
A Class D power amplifier produces 50
W output power with very low THD and
IM distortions. Driver overload protection
TM
is included in the amplifier circuitry. The
amplifier also incorporates thermal over-
load and short circuit protections. The
power supply accepts mains voltages from
100 to 240 VAC.
ISS Autostart
TM
The 7040A is equipped with Intelligent
Signal Sensing TM (ISS
function. ISS turns the 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. Play-
back 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 con-
tinuously powered and can be turned off
using the power switch on the connector
TM ) automatic start