MartinLogan Depth subwoofer - Manual (Page 5)

Level Knob
Setting the level too high will cause the bass to seem bloated
and is the single most common cause of bad sounding
subwoofers. A rule of thumb is that the subwoofer should
not draw attention to itself, but should simply make the
systems low end seem more extended and accurate.
Low Pass Filter Knob
When the Depth is connected in multi-channel mode (via
its LFE input), the low pass filter is not active and your
processor handles the bass management. When connected
in 2-channel mode (via its speaker or line level left/right
input) the low-pass filter is active.
As a general rule the low pass filter should be set at the
option approximately equal to 70% of you speakers lowest
frequency response. Example: The MartinLogan Aeon’s
lowest frequency response is 43Hz. 70% of 43Hz equals
30.1, so you should set the Depth’s low pass filter to 30Hz.
Remember, this is a general rule. We advise that once you
try the recommended setting using the formula above, you
should try the surrounding settings to see which sounds best.
Phase Control Knob
The phase control is entirely dependent on the size and
configuration of your listening environment, the placement
of the unit, and your seating arrangement. Due to the way
bass sound waves develop in different rooms, there is no rule
of thumb for setting phase. For Instance, if your room has a
peak at the subwoofer crossover area, you may wish to set
the phase so the actual acoustic outputs of the subwoofer and
main speakers are out of phase. Experiment, try different
settings and be patient.
25Hz Level Knob
The 25Hz Level knob significantly adjusts the level between
20 and 30Hz by ±12dB. This is an area where peaks and dips
of different amplitudes often manifest in real environments.
This setting is dependent on room size and construction,
system configuration and personal preference.
Auto/On/Standby Power Switch
The Auto/On/Standby switch controls Depth’s energy saving
feature. When set to 'Auto', the Depth will turn on when a
music signal is detected and off when there is none. The 'On'
setting prevents the Depth from entering energy saving
mode. The 'Standby' setting forces the Depth into energy sav-
ing mode. While set to 'Standby’, the Depth will not perform.
Status Light
The Depth is equipped with a multi-color LED to indicate
the subwoofers current status. The following list explains
the meaning of the different colors:
No color: No power. The Depth is not plugged in.
Yellow: Energy saving mode. If the power switch is set to
‘Auto’ this indicates the Depth detects no audio signal and
has automatically switched into energy saving mode.
Setting the power switch to ‘Standby’ will force the Depth
into this mode.
Green: Play mode. If the power switch is set to ‘Auto’ this
indicates the Depth detects an audio signal and has automat-
ically switched into play mode. Setting the power switch
to ‘On’ will force the Depth into this mode.
Red: Safety mode. This indicates that the Depth’s temper-
ature has exceeded nominal operating range. The Depth will
resume normal play mode when the temperature-sensor
reports a safe operating temperature.
A
BOUT THE
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ONTROLS
About the Controls 5
Figure 1. Depth controls located on the back of the subwoofer.