Settings: Volume; Settings: Low Pass Filter - Martin Logan Dynamo 600X Manuel De L'utilisateur

Figure 9. Settings: Low Pass Filter screen

Settings: Volume

• Volume: The volume (level) control allows you to adjust the
loudness of your subwoofer from -40dB to 12dB. For most
applications a setting between -14dB and 0dB is adequate.
Setting the level too high will cause the bass to seem bloated
and is the most common cause of bad sounding subwoofers.
A rule of thumb is that the subwoofer's bass should not draw
attention to itself. Instead it should simply make the system's low
end seem more extended and accurate.
• Sweep: The Sweep feature is useful for locating areas in your
listening room where troublesome rattles or resonances may
occur. The tone sweep feature may also prove useful when set-
ting phase, crossover, and volume on the subwoofer. Pressing
the Sweep toggle initiates a repeating tone sweep from
20–120Hz. Volume can be adjust while the tone sweep is
playing. Pressing the pause button pauses the subwoofer at a
specific tone frequency and also allows you to set a specific
tone frequency. While a tone frequency is paused, you can
select 'Continue' to adjust the level of the subwoofer. The tone
sweep will continue until the Sweep toggle is set to off.
6
Figure 10. Settings: Phase / Polarity screen

Settings: Low Pass Filter

The Low Pass Filter screen lets you to adjust the low-pass frequency
for the left and right (RCA or speaker level) inputs. This setting is
not applied to the LFE (RCA or XLR) inputs, instead leaving the task
of bass management to your audio/video processor.
D
ynamo
nel (Left In/Right In) systems and multi-channel (LFE In) home theater
systems. D
nect both Left In/Right In and LFE In, allowing you to achieve an
optimum setup for 2-channel listening while still allowing for multi-
channel (movie) mode listening. When listening to stereo source
material the system achieves optimum music integration with the
subwoofer playing below the front speaker's lowest response fre-
quency. While watching a movie the LFE track and the bass from
the surrounds can be fed to the subwoofer using (low pass) cross-
over settings from the processor's bass management system.
As a general rule, the Low-Pass Filter should be set at a value approxi-
mately equal to (or below) 70% of your main speaker's lowest
frequency response. For example, your speaker's frequency response
goes down to 43Hz. 70% of 43Hz equals 30.1, so you should set
the subwoofer's low pass filter to 30Hz. We advise that once you
Figure 11. Settings: Listening Modes screen
subwoofers offer exceptional performance in both 2-chan-
800X, 1100X, and 1600X offer the ability to con-
ynamo