SUBWOOFER PLACEMENT :
As a general rule we advise you to place your subwoofer at the front of the room, in
line with the main speakers. Getting closer to a wall, and even more to a corner, will
naturally amplify the sound of the subwoofer. Therefore, the position labeled “3+”
on the drawing will bring the highest sound pressure level and efficiency. In doing so,
you will also stimulate the natural reverberations of the room. The position labeled
“2+” is a good compromise between efficiency (sound pressure level) and
homogeneity (coupling with main speakers). The position labeled “1+” favor
homogeneity (coupling with main speakers, reduction of subwoofer’s location) and
slightly reduces room reverberations (but also perceived efficiency). According to
your integration constraints, placing the subwoofer on the sides or behind your
listening position (labeled “-“ on the drawing) is not strictly excluded. However, this
type of positioning induces an inconsistency that makes the subwoofer‘s location
easier to detect while listening (your ears identify the subwoofer’s position more
easily, which leads to a less consistent sound stage). If you have the possibility to
experiment with various positions, do so and take on the one that, in your listening
conditions and due to your criteria, provides the best result while listening.
A wall, and/or a corner, will naturally amplify the sound of your subwoofer,
sparing work to the amplifier (compared to subwoofer in the center of the room with a fixed sound level: you gain +6dB against a wall, +12dB in a
corner, knowing that doubling the amplifier’s power only results in a gain of +3dB of sound level).
STEREO CONFIGURATION
If your integrated amplifier (or preamplifier) has a « pre-out » low level output, connect the low level inputs of the module to the outputs (Left and
Right). If your amplifier does not have « pre-out » outputs, then connect the speaker outputs of the device to the « High Level » inputs of the
subwoofer amplifier module (this connection is parallel to the speakers).
It is imperative to observe polarities (risks of damage to both devices)!! WARNING: Never connect High Level and Low Level Inputs at the same
time.
Associated settings
Warning
: switches (6) and (7) must only be handled when the Standby/On switch (4) is on STANDBY.
Adjust the Freq switch (8) according to your main speakers’ size (between 9 and 12 o’clock for floor-standers and between 12 and 3 o’clock for
bookshelf models).
Please note that this setting is not linear.
Adjust the filter’s slope (6) according to your main speaker type: 12dB for sealed enclosure
and 24dB for bass reflex enclosure.
If the EQ switch (12) is set on “linear” position, the phase switch (7) must be set on 180° for a
12dB slope, or 0° for a 24dB slope. If the EQ switch (12) is set on “closed” position, then the
phase switch (7) must be set on 0° for a 12dB slope, or 180° for a 24dB slope.
Adjust the volume (9) as desired.
HOME CINEMA CONFIGURATION
Connect the “SUB PRE-OUT” output of the integrated amplifier or audio-video
processor/preamplifier to one of the “Low Level” inputs of the subwoofer’s
amplifier module.
If you want to set the high cut-off frequency of the subwoofer using your audio-
video processor, it should be done by setting the slope selector (6) on “LFE”
position. The cut-off frequency adjustment (8) is then disabled so that it can be
set in the “setup” menu of your audio-video device.
However, if you want to adjust the cut-off frequency using the subwoofer’s
amplifier module, you should set the cut-off frequency to its maximum value on
your audio-video device. Then follow the “associated settings” indications of the
previous chapter: stereo configuration.