NHT Evolution System - Manual (Page 38)

gered internally or externally. On the rear panel
of the X1 is a 3-position switch that determines
the trigger mode:
1) On; the X1 is always on.
2) Audio; the X1 will automatically turn on
when it detects an audio signal and turn off after
20 minutes with no signal.
3) 12V Ext; the X1 can be remotely turned
on or off when it detects a DC control signal from
another component in your system. The exter-
nal trigger will accept 5 - 24 volt (DC) signals.
For more information regarding external trig-
gers, consult your authorized dealer.
Master Gain (Front Panel)
The Master Gain control allows
you to adjust the volume of the
subwoofer relative to the moni-
tors. Use the Master Gain judi-
ciously. A properly calibrated
subwoofer blends seamlessly
with the Monitors or satellites without calling
attention to itself. Here are some general guide-
lines for setting the Master Gain control:
Begin by playing some stereo music you are
familiar with. Set your AV Receiver or Surround
Processor volume to a comfortable listening
level. Slowly increase or decrease the Master
Gain on the X1 crossover, listening for a natural
frequency balance between the subwoofer (or
tower bass module) and the front left and right
monitors. When properly balanced, you will
hear natural bass extension, without being
aware that it is coming directly from the sub-
woofer.
Once the Master Gain is set, the volume control
on your AV Receiver or Surround Processor will
control the volume of your entire system, includ-
ing the subwoofer.
LFE Gain Control (Front Panel)
LFE is short for ‘Low Frequency
Effects’. Low Frequency Effects
originally were low frequency
sounds added to movie sound-
tracks in order to increase their impact. For con-
sumer electronics, there is no standard con-
cerning what type of signal might be present on
the LFE channel. Therefore, we have added an
LFE input and gain control to the X1 so that you
can integrate whatever is present on the LFE
channel with the signal being reproduced by the
rest of the system.
After you have set the Master Gain level as
described above, play a multi-channel signal
through your system (as from a movie).
Sources with lots of bass output will be the most
useful. Adjust the LFE gain control until the
bass produced by the subwoofer reaches the
desired level. Most users initially set the level of
the LFE gain control at too high a level, so be
prepared to adjust the control over a long period
of time. You have reached an appropriate level
setting when movies soundtracks have impact
and music sources have punchy bass, but the
overall character of the bass produced by the
subwoofer is not thick and ill defined.
The level of the signal on the LFE channel
varies considerably from source to source, so
you may need to use the LFE level trim featured
in most receivers and processors to adjust the
LFE level on a source-by-source basis.
There is an LFE “Thru” output on the back of the
X1. For more information concerning the use of
this output, visit our website,
www.nhthifi.com/technicalhelp/evolution .